chore(package): update husky to version 4.0.9

Closes #21

Author: greenkeeper[bot]

package.json

@@ -33,7 +33,7 @@
     "eslint": "^6.5.1",
     "eslint-config-imperative": "^3.0.0",
     "eslint-plugin-imperative": "^3.0.0",
-    "husky": "^3.0.7",
+    "husky": "^4.0.9",
     "mocha": "^6.2.1",
     "nyc": "^14.1.1"
   },