Update dependency eslint-loader to v2.2.1

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
eslint-loader	devDependencies	minor	2.1.2 -> 2.2.1

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Release Notes

webpack-contrib/eslint-loader

### [`v2.2.1`](https://togithub.com/webpack-contrib/eslint-loader/blob/master/CHANGELOG.md#​221---2019-07-04) [Compare Source](https://togithub.com/webpack-contrib/eslint-loader/compare/v2.2.0...v2.2.1) - Fixed: path to eslint version for cache ([#​282](https://togithub.com/webpack-contrib/eslint-loader/issues/282) - [@​ricardogobbosouza](https://togithub.com/ricardogobbosouza)) ### [`v2.2.0`](https://togithub.com/webpack-contrib/eslint-loader/blob/master/CHANGELOG.md#​220---2019-07-03) [Compare Source](https://togithub.com/webpack-contrib/eslint-loader/compare/2.1.2...v2.2.0) - [Add ESLint 6 support](https://togithub.com/webpack-contrib/eslint-loader/commit/b6c3938aae61c0390ac8d941af50cf36df14cfc3) by [@​HDuck](https://togithub.com/HDuck)

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