chore(package): update eslint-plugin-prettier to version 3.1.1

Closes #19

Author: greenkeeper[bot]

package.json

@@ -17,7 +17,7 @@
     "eslint": "^4.1.0",
     "eslint-config-prettier": "^2.4.0",
     "eslint-config-xo": "^0.19.0",
-    "eslint-plugin-prettier": "^2.2.0",
+    "eslint-plugin-prettier": "^3.1.1",
     "husky": "^0.14.3",
     "jest": "^22.0.4",
     "jest-cli": "^22.0.4",