chore(package): update husky to version 2.4.0

Closes #15

Author: greenkeeper[bot]

package.json

@@ -31,7 +31,7 @@
   },
   "devDependencies": {
     "@types/jest": "^23.3.5",
-    "husky": "^1.1.2",
+    "husky": "^2.4.0",
     "jest": "^23.6.0",
     "lint-staged": "^8.0.4",
     "prettier": "^1.14.3",