Bump eslint from 4.19.1 to 6.8.0 (#144)

Bumps [eslint](https://github.com/eslint/eslint) from 4.19.1 to 6.8.0.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/master/CHANGELOG.md)
- [Commits](eslint/eslint@v4.19.1...v6.8.0)

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

package.json

@@ -44,7 +44,7 @@
 		"chrome-webstore-upload-cli": "^1.2.0",
 		"clean-webpack-plugin": "^3.0.0",
 		"css-loader": "^0.28.11",
-		"eslint": "^4.18.2",
+		"eslint": "^6.8.0",
 		"eslint-config-prettier": "^6.11.0",
 		"eslint-config-synacor": "^3.0.5",
 		"extract-text-webpack-plugin": "^3.0.2",