Bump eslint from 5.16.0 to 6.8.0

Bumps [eslint](https://github.com/eslint/eslint) from 5.16.0 to 6.8.0.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/master/CHANGELOG.md)
- [Commits](https://github.com/eslint/eslint/compare/v5.16.0...v6.8.0)

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -36,7 +36,7 @@
     "@types/node": "^12.7.12",
     "@typescript-eslint/parser": "^2.8.0",
     "@zeit/ncc": "^0.20.5",
-    "eslint": "^5.16.0",
+    "eslint": "^6.8.0",
     "eslint-plugin-github": "^4.1.1",
     "eslint-plugin-jest": "^22.21.0",
     "jest": "^24.9.0",