Update husky to its latest version

Author: robinvdvleuten

package.json

@@ -63,7 +63,7 @@
     "bundlesize": "^0.18.0",
     "dom-storage": "^2.0.2",
     "eslint": "^6.6.0",
-    "husky": "^3.0.9",
+    "husky": "^4.2.1",
     "jest": "^24.9.0",
     "microbundle": "^0.11.0",
     "npm-run-all": "^4.1.2",