⬆️ Update @typescript-eslint/eslint-plugin requirement

Updates the requirements on [@typescript-eslint/eslint-plugin](https://github.com/typescript-eslint/typescript-eslint/tree/HEAD/packages/eslint-plugin) to permit the latest version.
- [Release notes](https://github.com/typescript-eslint/typescript-eslint/releases)
- [Changelog](https://github.com/typescript-eslint/typescript-eslint/blob/master/packages/eslint-plugin/CHANGELOG.md)
- [Commits](https://github.com/typescript-eslint/typescript-eslint/commits/v2.0.0/packages/eslint-plugin)

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

package.json

@@ -31,7 +31,7 @@
   "devDependencies": {
     "@types/jest": "^24.0.11",
     "@types/tinycolor2": "^1.4.1",
-    "@typescript-eslint/eslint-plugin": "^1.6.0",
+    "@typescript-eslint/eslint-plugin": "^2.0.0",
     "@typescript-eslint/parser": "^2.0.0",
     "coveralls": "^3.0.3",
     "eslint": "^6.0.0",