chore(package): update lolex to version 4.0.1

Author: greenkeeper[bot]

package.json

@@ -20,7 +20,7 @@
     "concurrently": "^4.1.0",
     "glob": "^7.1.3",
     "istanbul": "^0.4.5",
-    "lolex": "^3.1.0",
+    "lolex": "^4.0.1",
     "mkdirp": "^0.5.1",
     "mocha": "^6.1.3",
     "mocha-headless-chrome": "^2.0.2",