Update tslint to the latest version 🚀

Version 5.0.0 of tslint just got published.

Dependency	tslint
Current Version	4.5.0
Type	devDependency

The version 5.0.0 is not covered by your current version range.

Without accepting this pull request your project will work just like it did before. There might be a bunch of new features, fixes and perf improvements that the maintainers worked on for you though.

I recommend you look into these changes and try to get onto the latest version of tslint. Given that you have a decent test suite, a passing build is a strong indicator that you can take advantage of these changes by merging the proposed change into your project. Otherwise this branch is a great starting point for you to work on the update.

Release Notes

v5.0.0

🔥 Breaking changes

Minimum version of TypeScript version is now 2.1.0 (#2425)
The severity level of rules are now configurable and defaults to severity "error". This affects the output of formatters:
- [formatter] msbuild was outputting all failures as "warning".
- [formatter] pmd was outputting all failures as priority 1. Now, it uses priority 3 for "error" (default) and priority 4 for "warning"
[formatter] json changed the fix property to now contain either one replacement or an array of replacements (#2403)
tslint:recommended configuration updated with tslint:latest rules & options (#2424)
Removed no-unused-new rule, with logic moved into no-unused-expression (#2269)
no-trailing-whitespace now checks template strings by default. Use the new options ignore-template-strings to restore the old behavior. (#2359)

API breaks for custom rules

Removed method skip from RuleWalker (#2313)
Removed all use of the TypeScript Language Service, use only Program APIs instead (#2235)
- This means that some rules that previously worked without the type checker now require it. This includes:
  - no-unused-variable
  - no-use-before-declare
- This breaks custom rule compilation. If your rule was not using the ts.LanguageService APIs, the migration is quite simple:
```
- public applyWithProgram(srcFile: ts.SourceFile, langSvc: ts.LanguageService): Lint.RuleFailure[] {
-     return this.applyWithWalker(new Walker(srcFile, this.getOptions(), langSvc.getProgram()));
+ public applyWithProgram(srcFile: ts.SourceFile, program: ts.Program): Lint.RuleFailure[] {
+     return this.applyWithWalker(new Walker(srcFile, this.getOptions(), program));
```
- N.B. If you are refactoring your custom rules, consider these performance tips for writing custom rules.
Removed createFix. Replacements should be passed directly into addFailure. (#2403)
Removed deprecated scanAllTokens and skippableTokenAwareRuleWalker (#2370)

🎉 Notable features & enhancements

[feature] The severity level of rules are now individually configurable. Default severity can also be configured. (#629, #345)

Valid values for severity: default | error | warn | warning | none | off
Valid values for defaultSeverity: error | warn | warning | none | off
Old style:

{
    "extends": "tslint:latest",
    "rules": {
        "callable-types": true,
        "max-line-length": [true, 140]
    }
}

New style (in this example, callable-types outputs errors and max-line-length outputs warnings):

{
    "extends": "tslint:latest",
    "defaultSeverity": "error",
    "rules": {
        "callable-types": true,
        "max-line-length": {
            "options": 140,
            "severity": "warning"
        }
    }
}

[new-rule] prefer-template (#2243)
[new-rule] return-undefined (#2251)
[new-rule] no-reference-import (#2273)
[new-rule] no-unnecessary-callback-wrapper (#2249)
[new-fixer] linebreak-style (#2394)
[new-fixer] eofline (#2393)

Full list of changes

[api] Added class OptionallyTypedRule, which allows rule authors to write a rule that applies when typing is either enabled or disabled (#2300)
[bugfix] prefer-function-over-method now ignores abstract methods (#2307)
[bugfix] arrow-parens with option ban-single-arg-parens now correctly handles functions with return type annotation (#2265)
[bugfix] prefer-function-over-method exclude overload signatures (#2315)
[bugfix] use-isnan now applies only to comparison operators (#2317)
[bugfix] file-header-rule now handles single-line comments correctly (#2320)
[bugfix] newline-before-return: fix handling of blank lines between comments (#2321)
[bugfix] trailing-comma No longer enforce trailing commas in type parameters and tuple types (#2236)
[bugfix] align don't fix if it would remove code (#2379)
[bugfix] unified-signatures now recognizes rest parameters (#2342)
[bugfix] no-inferrable-types don't warn for inferrable type on readonly property (#2312)
[bugfix] trailing-comma no longer crashes on new without parentheses (e.g. new Foo) (#2389)
[bugfix] semicolon Ignore comments when checking for unnecessary semicolon (#2240)
[bugfix] semicolon Don't report unnecessary semicolon when followed by regex literal (#2240)
[bugfix] CLI: exit with 0 on type check errors when --force is specified (#2322)
[bugfix] CLI: --test now correctly strips single quotes from patterns on windows (#2322)
[bugfix] prefer-const only fix initialized variables (#2219)
[bugfix] prefer-const correctly handle variables shadowed by parameters and catched exceptions (#2219)
[bugfix] prefer-const don't warn if one variable in a for loop initializer can not be const (#2219)
[bugfix] prefer-const handle more cases in destructuring (#2219)
[bugfix] no-unused-expression allow comma separated assignments (#2269)
[chore] removed update-notifier dependency (#2262)
[development] allow rule tests to specify version requirement for typescript (#2323)
[enhancement] ignore-properties option of no-inferrable-types now also ignores parameter properties (#2312)
[enhancement] unified-signatures now displays line number of the overload to unify if there are more than 2 overloads (#2270)
[enhancement] trailing-comma New checks for CallSignature and NamedExports (#2236)
[enhancement] semicolon New check for export statements, function overloads and shorthand module declaration (#2240)
[enhancement] semicolon Report unnecessary semicolons in classes and in statement position (for option "always" too) (#2240)
[enhancement] semicolon check for semicolon after method overload (#2240)
[enhancement] array-type now consider object, undefined and never as simple types, allowing object, undefined[] and never[] (#1843)(#2353)
[enhancement] align check statement alignment for all blocks (#2379)
[enhancement] aligncheck parameter alignment for all signatures (#2379)
[enhancement] --test can handle multiple paths at once (#2322)
[enhancement] only-arrow-functions allow functions that use this in the body (#2229)
[enhancement] CLI: print error when --type-check is used without --project (#2322)
[enhancement] CLI: don't print stack trace on type check error (#2322)
[enhancement] CLI: added -p as shorthand for --project to be consistent with tsc (#2322)
[enhancement] prefer-const show warnings for var (#2219)
[enhancement] quotemark fixer unescapes original quotemark (e.g. '\'' -> "'") (#2359)
[enhancement] no-unused-expression allow indirect eval (0, eval)(""); (#2269)
[enhancement] no-unused-expression checking for unused new can now use option allow-fast-null-checks (#2269)
[enhancement] no-unused-expression find unused comma separated expressions in all locations of the code (#2269)
[enhancement] no-unused-expression find unused expressions inside void expression (#2269)
[new-config-option] Adds defaultSeverity with options error, warning, and off. (#2416)
[new-formatter] TAP formatter (#2325)
[new-rule-option] no-unused-expression adds option allow-tagged-template to allow tagged templates for side effects (#2269)
[new-rule-option] no-unused-expression adds option allow-new to allow new without using the new object (#2269)
[new-rule-option] member-access adds no-public option (#2247)
[new-rule-option] curly added option ignore-same-line (#2334)
[new-rule-option] {destructuring: "all"} to only warn if all variables in a destructuring can be const (#2219)
[new-rule-option] added ignore-template-strings to no-trailing-whitespace (#2359)
[rule-update] array-type now consider undefined and never as simple types, allowing undefined[] and never[] (#1843)

Thanks to our contributors!

Brian Olore
Andy Hanson
@andy-ms
Chris Barr
Klaus Meinhardt
@bumbleblym
Josh Goldberg
James Clark
@vilic
Aleksandr Filatov
Matt Banz
Karol Janyst
Mike Deverell
Alexander James Phillips
Irfan Hudda

Not sure how things should work exactly?

There is a collection of [frequently asked questions](https://greenkeeper.io/faq.html) and of course you may always [ask my humans](https://github.com/greenkeeperio/greenkeeper/issues/new).

Your Greenkeeper Bot :palm_tree:

Version 5.1.0 just got published.

Update to this version instead 🚀

Release Notes

v5.1.0

[new-rule] no-invalid-template-strings (#2332)
[new-rule] no-sparse-arrays (#2407)
[new-rule-option] no-void-expression: adds ignore-arrow-function-shorthand (#2445)
[api] tslint:all configuration (#2417)
[bugfix] In tslint:recommended move no-reference-import from jsRules to rules (#2441)
[bugfix] no-unnecessary-callback-wrapper: only check if callback is identifier, allow all other expressions (#2510)
[bugfix] member-access: Skip index signature, it can not have an access modifier (#2437)
[bugfix] restrict-plus-operands fixes regression where every assignment and comparison was checked (#2454)
[bugfix] no-unnecessary-callback-wrapper: allow async wrapper function (#2510)
[bugfix] prefer-for-of: No error if delete is used (#2458)
[bugfix] radix: don't warn for missing radix on method calls (#2352)
[bugfix] no-use-before-declare: Handle symbol with empty declarations list. (#2436)
[bugfix] strict-type-predicates: Check for construct signatures in isFunction. (#2479)
[enhancement] strict-boolean-expressions: When --strictNullChecks is turned off, allow-null-union and allow-undefined-union turn off "always truthy" errors. (#2373)
[enhancement] radix: added check for global.parseInt and window.parseInt (#2352)
[enhancement] arrow-return-shorthand: Improve failure message when return expression is an object literal (#2466)

Version 5.2.0 just got published.

Update to this version instead 🚀

Release Notes

v5.2.0

[rule-change] no-console bans all console methods when no methods are specified (#2610)
[new-rule] no-object-literal-type-assertion (#2580)
[new-rule] no-irregular-whitespace (#2487)
[new-rule] prefer-switch (#2331)
[new-rule] number-literal-format (#2526)
[new-rule] deprecation (#2395)
[new-rule] no-unnecessary-type-assertion (#2519)
[new-fixer] interface-over-type-literal (#2617)
[new-fixer] callable-types (#2552)
[new-fixer] no-string-literal (#2495)
[new-fixer] no-internal-module (#2517)
[new-rule-option] align rule added members option, which checks alignment of methods and properties of classes, objects, interfaces, type literals and object destructuring (#2387)
[new-rule-option] align rule added elements option, which checks alignment of elements in array literals, array destructuring and tuple types (#2387)
[new-rule-option] trailing-comma adds more granular options to specify trailing commas for arrays, objects, functions, type literals, imports, and exports (#2538)
[api] Deprecate ScopeAwareRuleWalker and BlockScopeAwareRuleWalker. (#2561)
[develop] added support for error templates in rule tests (#2481)
[bugfix] Fixes "Severity for rule not found" error (#2516)
[bugfix] no-unused-expression: allow void(0) in addition to void 0 and void in expression and statement position (#2645)
[bugfix] align: fix false positive for files with BOM (#2642)
[bugfix] return-undefined: Handle contextual types with ambiguous signatures; allow any; and handle async functions. (#2576)
[bugfix] semicolon: don't mark semicolon as unnecessary when the next statement is on the same line (#2591)
[bugfix] no-internal-module: no more false positives for global augmentation (#2517)
[bugfix] no-unnecessary-qualifier: no longer breaks when walking a function that references arguments (#2555)
[bugfix] prefer-const no longer shows warnings on ambient declarations (#2391)
[bugfix] callable-types: suggest correct fix for interfaces with type arguments (#2552)
[bugfix] quotemark: fix regression with jsx attributes (#2605)
[bugfix] adjacent-overload-signatures handles functions ending in semicolon (#2412)
[bugfix] object-literal-key-quotes: correctly stringify numbers when fixing (#2515)
[bugfix] object-literal-key-quotes: does no longer require quotes for property names containing digits (#2515)
[enhancement] Failures in extended config files now indicate which file (#2588)
[enhancement] align: Don't report 'statements are not aligned' for empty statements (#2653)
[enhancement] class-name now also checks class expressions (#2553)
[enhancement] optionExamples: Allow to use an options array directly instead of a string representation. (#2527)
[enhancement] rulesDirectory can now be resolved with Nodes resolve logic, if the directory contains an index.js (#2163) (#2358)
[enhancement] no-unused-expression: narrow error location for comma separated expressions and conditional expressions (#2645)
[enhancement] no-string-literal now handles escaped strings (#2495)
[enhancement] no-unnecessary-callback-wrapper: Allow x => x(x) (#2524)
[enhancement] no-var-keyword: Allow global var declarations (#2513)

Thanks to our contributors!

Andy Hanson
Alex Eagle
Donald Pipowitch
Klaus Meinhardt
Gord P
Andy
Quentin
Mitchell Wills
Vito
CSchulz
Josh Goldberg
Brian Olore
Manuel Lopez
James Clark

Version 5.3.0 just got published.

Update to this version instead 🚀

Release Notes

v5.3.0

This change may require a change to tslint.json

[enhancement] prefer-switch: Change default min-cases to 3. (#2669)

🎉 Notable features & enhancements

[new-cli-option] cli: Add outputAbsolutePaths option (#2667)
[new-rule] prefer-object-spread (#2624)
[new-rule] encoding (#2368)
[new-rule] prefer-conditional-expression (#2363)
[new-rule-option] indent support indent size (#2723)
[new-rule-option] object-literal-sort-keys adds ignore-case (#2592)
[new-rule-option] quotemark: Add avoid-template option (#2766)
[new-rule-option] await-promise: What's considered a "Promise" is now configurable. (#2661)
[new-fixer] indent (#2723)
[new-fixer] typedef-whitespace (#2718)
[enhancement] better error messages in variable-name (#2672)
[enhancement] typedef: Use name or parameters for error location (#2460)
[enhancement] object-literal-sort-keys: check shorthand properties (#2592)
[enhancement] space-before-function-paren: Handle get/set accessor (#2700)
[enhancement] typedef-whitespace added checks for arrow function, call and construct signature (#2718)
[enhancement] no-object-literal-type-assertion: Allow cast to any (#2671)
[enhancement] cli: -p option handles directories (#2756)
[develop] testing rules with type information is enabled when a tsconfig.json is found next to tslint.json (#2769)
[configuration] deprecate mixed case tslint.json (#2713)
[bugfix] return-undefined: Treat a return type void | undefined same as void (#2731)
[bugfix] no-unnecessary-initializer: Handle BindingElement anywhere, not just in a VariableDeclaration. (#2707)
[bugfix] jsdoc-format: correctly handle alignment in files with BOM (#2619)
[bugfix] jsdoc-format: don't treat empty comments (/**/) as jsdoc (#2619)
[bugfix] typedef-whitespace don't warn for leading whitespace if token is preceded by line break (#2718)
[bugfix] Make "completed-docs" rule respect "public" privacy (or lack thereof) (#2749)
[bugfix] jsdoc-format: fixed error position if line ends with \r\n (#2619)
[bugfix] prefer-switch: add missing checks for some expressions (#2686)
[bugfix] prefer-template: Allow "a" + "b" + "c". (#2741)
[bugfix] prefer-const: fix false positive with variable declared outside of for-of or for-in (#2760)
[bugfix] --project: fix file matching with relative path to tsconfig.json (#2688)
[bugfix] no-default-export: correctly handle export default abstract class {...} (#2630)
[bugfix] no-mergeable-namespace: display correct line in error message (#2656)
[bugfix] object-literal-sort-keys: handle object spread correctly (#2592)
[bugfix] Consistently output absolute/relative paths (#2667)
[bugfix] await-promise: Consider types derived from a Promise in union types too. (#2661)
[bugfix] no-unsafe-any: Fix bug where number literal in type position was flagged as an unsafe any. (#2712)
[api] Deprecate Lint.Utils.objectify (#2764)

Thanks to our contributors!

Andy Hanson
Klaus Meinhardt
Martin Probst
Filipe Silva
walkerburgin
René Scheibe

Version 5.3.2 just got published.

Update to this version instead 🚀

Release Notes

v5.3.2

[bugfix] Fixes not a directory error

Version 5.4.3 just got published.

Update to this version instead 🚀

Release Notes

v5.4.3

🛠 Bugfixes

[bugfix] Fixed regression with empty --out file (#2867)
[bugfix] unified-signatures: Don't suggest to unify rest parameters. (#2874)
[bugfix] binary-expression-operand-order: Allow if both sides of the binary expression are literals. (#2873)
[bugfix] Restore compatibility with typescript@2.1 and 2.2 for whitespace, space-before-function-paren and deprecation (#2893)
[docs] no-string-literal: Fix documentation (#2875)

Version 5.5.0 just got published.

Update to this version instead 🚀

Release Notes

v5.5.0

Editor's note: This release features an important bugfix for overlapping fixes when using --project and --fix (#2864).

🎉 New rules and options

[new-rule-option] completed-docs: Add enum-members option (#2911)
[new-rule] no-this-reassignment (#2931)

🛠 Bugfixes & enhancements

[bugfix] encoding closes files correctly (#2958)
[bugfix] whitespace fix whitespace "check-module" to properly lint and fix errors (#2401) (#2825)
[bugfix]: whitespace: now correctly handles dynamic imports introduced in typescript@2.4.0 (#2924)
[bugfix] switch-final-break: don't fail if break jumps to a label outside of the switch (#2914)
[bugfix] no-shadowed-variable: exempt this parameter (#2598)
[bugfix] prefer-for-of correctly handles variable scopes and other unrelated identifiers (#2984)
[bugfix] Don't leave blank lines when no-unused-variable autofix removes whole import (#2901)
[cli] restore -v option (#2926)
[enhancement] Print stack trace of exceptions (#2890)
[enhancement] Added allow-empty-catch option to no-empty (#2886)
[enhancement] prefer-const: handle destructuring in for-of loop initializer as if {"destructuring": "all"} was specified (#2904)
[enhancement] no-shadowed-variable: added checks for other shadowing declarations, e.g. interfaces, classes, type parameters, imports, etc. (#2598)
[rule-change] no-shadowed-variable no longer fails for declarations in the same scope, e.g. var foo; var foo;. Use the rule no-duplicate-variable to find such errors. (#2598)

Thanks to our contributors!

Klaus Meinhardt
Josh Goldberg
Petr Kosikhin
Pablo Núñez
Benny Neugebauer
Radon Rosborough
reduckted
Chris Barr
Julian Verdurmen

Version 5.6.0 just got published.

Update to this version instead 🚀

Release Notes

v5.6.0

🎉 New rules, options, and fixers

[new-rule] no-duplicate-imports (#3075)
[new-rule] no-submodule-imports (#3091)
[new-rule] space-within-parens (#2959)
[new-fixer] member-access (#2969)
[new-fixer] no-null-keyword: fix x == null to x == undefined (#2802)
[new-rule-option] no-shadowed-variable let's you optionally ignore certain kinds of declarations (#3030)
[new-rule-option] prefer-conditional-expression adds check-else-if (#2963)

🛠 Bugfixes & enhancements

[bugfix] array-type: consider this to be simple type (#2982)
[bugfix] await-promise accepts not only union types but also intersection types with Promise-like types (#2987)
[bugfix] callable-types: don't remove export modifier of interfaces (#2962)
[bugfix] completed-docs: Only checks variables at the file-level. (#2950)
[bugfix] completed-docs: Uses correct visibility of variables. (#2950)
[bugfix] no-floating-promises: recognize rejection handler passed as second argument to promise.then() (#3048)
[bugfix] no-shadowed-variable don't warn for shadowed type parameter on static class members (#3030)
[bugfix] no-shadowed-variable fixed false positive with key name in index signature (#3030)
[bugfix] no-shadowed-variable fixed false positive with parameter inside function decorator (#3030)
[bugfix] no-unsafe-any: allow truthyness and falsyness checks (#3008)
[bugfix] no-unused-variable fixed crash when using destructuring (#3058)
[bugfix] one-line correctly handles multiline type parameters (#3004)
[bugfix] prefer-for-of fixed false positives when array is modified, e.g. arr[i]++ (#3044)
[bugfix] prefer-object-spread adds parens when fixing arrow function return (#3026)
[bugfix] prefer-object-spread permit functions as first argument to Object.assign (#3098)
[bugfix] space-before-function-paren Handle default exports of functions without names like anonymous functions (fixes #3040) (#3053)
[bugfix] Fixed an issue where, at runtime, the module ./test/parse could not be located due after consumers had run yarn clean (#3072)
[enhancement] no-null-keyword allows strict comparison (#2802)
[enhancement] no-switch-case-fall-through matches // falls through comments case insensitive and allows trailing text (#2983)
[enhancement] ordered-imports: support importEqualsDeclaration (#3102)
[enhancement] Added NaN and (+/-)Infinity as numbers to no-inferrable-types (#2885)
[enhancement] Improved CLI error message when no filenames are specified (#3066)
[rule-change] prefer-conditional-expression: ignore if-else-if by default. Use the new "check-else-if" option to check nested if statements (#2963)

Thanks to our contributors!

Klaus Meinhardt
Julian Verdurmen
Alexandre Alonso
Josh Goldberg
ksvitkovsky
Daisuke Yokomoto
Andrii Dieiev
Florent Suc
Jason Killian
Amin Pakseresht
reduckted
vilicvane
Russell Briggs
Andy Hanson
Leo Liang
Dan Homola
BehindTheMath
David Golightly
aervin
Daniel Kucal
Ika
Chris Barr

Version 5.7.0 just got published.

Update to this version instead 🚀

Release Notes

v5.7.0

🎉 New rules, options, and fixers

[new-rule] no-parameter-reassignment (#3045)
[new-rule-option]: object-literal-sort-keys: Add match-declaration-order option (#2829)
[new-rule-option] check-type-operator for whitespace rule (#3083)
[new-rule-option] whitespace: Add check-rest-spread option (#3089)

🛠 Bugfixes & enhancements

[api] AbstractRule#applyWithFunction allows additional parameter that is passed through to walkFn (#3140)
[api] AbstractRule#applyWithFunction has better type checking for its type parameter (#2660)
[bugfix] member-access autofix now correcly inserts public keyword after decorators (#3162)
[bugfix] prefer-const correctly handle catch without binding parameter introduced in typescript@2.5.1 (#3151)
[bugfix] no-invalid-template-strings allows backslash-prefixed template expressions (#3116)
[bugfix] deprecation no longer shows errors on imports and exports (#3141)
[bugfix] deprecation: fix false positive when calling a function or method where another overload is deprecated (#2883)
[bugfix] whitespace: fixed "check-separator" for trivial for cases. (#3132)
[bugfix] prefer-object-spread prevent spreading this as it is not allowed by the compiler (#3126)
[bugfix] msbuild formatter uses backslashes in paths on Windows (#3145)
[bugfix] no-namespace ignores global augmentation (#3161)
[enhancement] remove superfluous empty lines on tslint output. (#3121)
[enhancement] no-submodule-imports allows whitelisting of submodules like @angular/core/testing (#3129)
[enhancement] custom lint rules will be resolved using node's path resolution to allow for loaders like ts-node (#3108)
[enhancement] quotemark no longer requires "single" or "double" to be the first option. The rule defaults to "double" if none is specified. (#3114)
[enhancement] no-unused-variable autofix removes trailing comments of imports (#3156)
[enhancement] no-unnecessary-type-assertion allows certain necessary assertions to prevent type widening (#3120)

Thanks to our contributors!

Paul Gschwendtner
Andy Hanson
ksvitkovsky
Santi Albo
aervin
Junle Li
Joscha Feth
WiseBird
Caleb Eggensperger
WGroenestein
Bowen Ni

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