chore(deps): update commitlint monorepo to ^8.1.0

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	New value	References	Sourcegraph
@commitlint/cli	devDependencies	minor	^8.1.0	source
@commitlint/config-conventional	devDependencies	minor	^8.1.0	source

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Release Notes

conventional-changelog/commitlint

### [`v8.1.0`](https://togithub.com/conventional-changelog/commitlint/blob/master/CHANGELOG.md#​810httpsgithubcomconventional-changelogcommitlintcomparev800v810-2019-07-15) [Compare Source](https://togithub.com/conventional-changelog/commitlint/compare/v8.0.0...v8.1.0) This release is versioned as minor change because some of the core components are rewritten to TypeScript. It's part of the full port to TypeScript, currently in progress at [#​659](https://togithub.com/conventional-changelog/commitlint/issues/659). ##### Bug Fixes - add explicit dependency on chalk ([#​687](https://togithub.com/conventional-changelog/commitlint/issues/687)) ([9075844](https://togithub.com/conventional-changelog/commitlint/commit/9075844)) - pass ignores from configuration in [@​commitlint/cli](https://togithub.com/commitlint/cli) ([#​668](https://togithub.com/conventional-changelog/commitlint/issues/668)) ([da99aaa](https://togithub.com/conventional-changelog/commitlint/commit/da99aaa))

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[codecov-io]

Codecov Report

Merging #622 into master will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #622   +/-   ##
=======================================
  Coverage   83.09%   83.09%           
=======================================
  Files          15       15           
  Lines        2058     2058           
  Branches      423      423           
=======================================
  Hits         1710     1710           
  Misses        346      346           
  Partials        2        2

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