chore(package): update eslint-plugin-prettier to version 3.1.0

Closes #31

Author: greenkeeper[bot]

package.json

@@ -59,7 +59,7 @@
     "eslint-config-airbnb-base": "^12.1.0",
     "eslint-config-prettier": "^2.3.0",
     "eslint-plugin-import": "^2.7.0",
-    "eslint-plugin-prettier": "^2.1.2",
+    "eslint-plugin-prettier": "^3.1.0",
     "graphql": "^0.12.3",
     "graphql-tools": "^2.18.0",
     "husky": "^0.14.3",