chore(deps): update commitlint to v8.2.0

[renovate[bot]]

This PR contains the following updates:

Package	Update	Type	Change	Sourcegraph
@commitlint/cli	minor	devDependencies	8.1.0 -> 8.2.0
@commitlint/config-conventional	minor	devDependencies	8.1.0 -> 8.2.0
@commitlint/travis-cli	minor	devDependencies	8.1.0 -> 8.2.0

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Release Notes

conventional-changelog/commitlint

### [`v8.2.0`](https://togithub.com/conventional-changelog/commitlint/blob/master/CHANGELOG.md#​820httpsgithubcomconventional-changelogcommitlintcomparev810v820-2019-09-16) [Compare Source](https://togithub.com/conventional-changelog/commitlint/compare/v8.1.0...v8.2.0) 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 - pass defaultIgnores from configuration in [@​commitlint/cli](https://togithub.com/commitlint/cli) ([#​771](https://togithub.com/conventional-changelog/commitlint/issues/771)) ([a259014](https://togithub.com/conventional-changelog/commitlint/commit/a259014))

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