chore(package): update eslint-plugin-json to version 2.1.1

Closes #328

Author: greenkeeper[bot]

package.json

@@ -53,7 +53,7 @@
     "eslint": "^6.0.0",
     "eslint-config-standard": "^14.0.0",
     "eslint-plugin-import": "^2.16.0",
-    "eslint-plugin-json": "^1.4.0",
+    "eslint-plugin-json": "^2.1.1",
     "eslint-plugin-node": "^10.0.0",
     "eslint-plugin-promise": "^4.0.1",
     "eslint-plugin-standard": "^4.0.0",