Update lockfile, dependencies and fix lint issues. (#140)

* Update dependencies and lockfile.

* Resolve lint errors.

Author: sblaurock

.mocharc.json

@@ -1,4 +1,5 @@
 {
   "recursive": true,
+  "timeout": 5000,
   "require": ["@babel/register", "./spec/mocha.setup.js"]
 }