chore(package): update lint-staged to version 7.3.0

Closes #25

Author: greenkeeper[bot]

package.json

@@ -35,7 +35,7 @@
     "eslint-plugin-prettier": "^2.4.0",
     "graphql-persisted-document-loader": "^1.0.1",
     "husky": "^0.14.3",
-    "lint-staged": "^4.1.3",
+    "lint-staged": "^7.3.0",
     "memory-fs": "^0.4.1",
     "mocha": "^3.2.0",
     "nyc": "^11.0.2",