deps: bump @typescript-eslint/eslint-plugin from 2.28.0 to 2.30.0 (#252)

Author: dependabot-preview[bot]

package-lock.json

@@ -63,7 +63,7 @@
     "@types/jest": "^25.2.1",
     "@types/js-yaml": "^3.12.3",
     "@types/node": "~12",
-    "@typescript-eslint/eslint-plugin": "^2.28.0",
+    "@typescript-eslint/eslint-plugin": "^2.30.0",
     "@typescript-eslint/parser": "^2.30.0",
     "@zeit/ncc": "^0.22.1",
     "eslint": "^6.8.0",