Update eslint-config-problems to version 2.0.0 (#251)

Author: greenkeeper[bot]

package.json

@@ -35,7 +35,7 @@
     "ava": "^0.25.0",
     "coveralls": "^3.0.0",
     "eslint": "^5.0.0",
-    "eslint-config-problems": "1.1.0",
+    "eslint-config-problems": "2.0.0",
     "nyc": "^13.1.0",
     "postcss-import": "^12.0.0",
     "prettier": "~1.15.0",