chore(package): update eslint-plugin-json to version 2.1.0

Closes #17

Author: greenkeeper[bot]

package.json

@@ -26,7 +26,7 @@
     "eslint": "^5.4.0",
     "eslint-config-prettier": "^3.0.1",
     "eslint-config-xo": "^0.24.2",
-    "eslint-plugin-json": "^1.2.1",
+    "eslint-plugin-json": "^2.1.0",
     "eslint-plugin-prettier": "^2.6.2",
     "execa": "^1.0.0",
     "husky": "^0.14.3",