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

Closes #5

Author: greenkeeper[bot]

package.json

@@ -34,7 +34,7 @@
     "express": "^4.16.2",
     "jest": "^22.0.3",
     "husky": "^0.14.1",
-    "lint-staged": "^6.0.0",
+    "lint-staged": "^7.3.0",
     "npm-run-all": "^4.0.1",
     "npmpub": "^3.1.0",
     "prettier": "^1.5.2",