Update dependency tslint to v6- autoclosed

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
tslint (source)	devDependencies	major	5.20.1 -> 6.1.3

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Release Notes

palantir/tslint

### [`v6.1.3`](https://togithub.com/palantir/tslint/blob/master/CHANGELOG.md#v613) [Compare Source](https://togithub.com/palantir/tslint/compare/6.1.2...6.1.3) - [bugfix] add support for TypeScript 4.0 peer dependency ([#​4943](https://togithub.com/palantir/tslint/issues/4943)) ### [`v6.1.2`](https://togithub.com/palantir/tslint/blob/master/CHANGELOG.md#v612) [Compare Source](https://togithub.com/palantir/tslint/compare/6.1.1...6.1.2) - [bugfix] restore typings compatibility with TS < 3.8 ([#​4933](https://togithub.com/palantir/tslint/issues/4933)) ### [`v6.1.1`](https://togithub.com/palantir/tslint/blob/master/CHANGELOG.md#v611) [Compare Source](https://togithub.com/palantir/tslint/compare/6.1.0...6.1.1) - [bugfix] upgrade mkdirp dependency to `^0.5.3` ([#​4918](https://togithub.com/palantir/tslint/issues/4918)) ### [`v6.1.0`](https://togithub.com/palantir/tslint/blob/master/CHANGELOG.md#v610) [Compare Source](https://togithub.com/palantir/tslint/compare/6.0.0...6.1.0) - [enhancement] Upgrade to TypeScript 3.8, support new syntax ([#​4915](https://togithub.com/palantir/tslint/issues/4915)) - [docs][`no-object-literal-type-assertion`]() fix typo in rule description ([#​4911](https://togithub.com/palantir/tslint/issues/4911)) Thanks to our contributors! - Daniel Zwelling - Ryan Delaney ### [`v6.0.0`](https://togithub.com/palantir/tslint/blob/master/CHANGELOG.md#v600) [Compare Source](https://togithub.com/palantir/tslint/compare/5.20.1...6.0.0) This version has been marked as deprecated on NPM to encourage users to migrate to ESLint. - [bugfix] fix `enforce-trailing-newline` option in [`file-header`](https://palantir.github.io/tslint/rules/file-header/) rule ([#​4890](https://togithub.com/palantir/tslint/issues/4890)) - [bugfix] avoid writing to temp files with `writeFileSync` on macOS 10.15 ([#​4887](https://togithub.com/palantir/tslint/issues/4887)) - [bugfix] fix crash in [`completed-docs`](https://palantir.github.io/tslint/rules/completed/) rule when tag contents are undefined ([#​4895](https://togithub.com/palantir/tslint/issues/4895)) - [docs] fix example code of Radix rule ([#​4892](https://togithub.com/palantir/tslint/issues/4892)) - [docs] Add missing colon after `[error]` in testing rules documentation ([#​4903](https://togithub.com/palantir/tslint/issues/4903)) Thanks to our contributors! - Ivan Sorokin - Tanmoy Bhowmik - Meng Wang - Jay Bhagat - Aman Sharma - Josh Goldberg

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