Bump @typescript-eslint/eslint-plugin from 2.30.0 to 2.31.0

Bumps [@typescript-eslint/eslint-plugin](https://github.com/typescript-eslint/typescript-eslint/tree/HEAD/packages/eslint-plugin) from 2.30.0 to 2.31.0.
- [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/v2.31.0/packages/eslint-plugin)

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

Author: dependabot-preview[bot]

package-lock.json

@@ -31,7 +31,7 @@
   },
   "devDependencies": {
     "@types/jest": "^25.2.1",
-    "@typescript-eslint/eslint-plugin": "^2.30.0",
+    "@typescript-eslint/eslint-plugin": "^2.31.0",
     "@typescript-eslint/parser": "^2.30.0",
     "@zeit/ncc": "^0.22.1",
     "dotenv": "^8.2.0",