chore(package): update mocha to version 7.1.2

Closes #76

Author: greenkeeper[bot]

package.json

@@ -21,7 +21,7 @@
     "istanbul": "^0.4.5",
     "lolex": "^4.0.1",
     "mkdirp": "^0.5.1",
-    "mocha": "^6.1.3",
+    "mocha": "^7.1.2",
     "mocha-headless-chrome": "^2.0.2",
     "npm-check-updates": "^3.1.7",
     "requirejs": "^2.3.6",