Bump eslint from 3.19.0 to 6.6.0

Bumps [eslint](https://github.com/eslint/eslint) from 3.19.0 to 6.6.0. - [Release notes](https://github.com/eslint/eslint/releases) - [Changelog](https://github.com/eslint/eslint/blob/master/CHANGELOG.md) - [Commits](eslint/eslint@v3.19.0...v6.6.0) Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

package.json

@@ -40,7 +40,7 @@
  "babel-preset-react-hmre": "^1.1.1",
  "cross-env": "^5.0.0",
  "css-loader": "^0.28.4",
- "eslint": "^3.19.0",
+ "eslint": "^6.6.0",
  "eslint-plugin-babel": "^4.1.1",
  "eslint-plugin-react": "^7.0.1",
  "file-loader": "^0.11.1",