Dependency Updates (#308)

* build(dev-deps): replace istanbul with nyc because its deprecated

Replace coverage with nyc, as istanbul is deprecated (https://www.npmjs.com/package/istanbul)

* build(dev-deps): update simplifyify

Changelog: https://github.com/JS-DevTools/simplifyify/blob/master/CHANGELOG.md

* build(dev-deps): update coveralls, npm-run-all

* build(dev-deps): update es6-shim, http-server

* build(dev-deps): update mocha to the highest node v10 supported version

Never versions require higher nodejs versions

* ci

---------

Co-authored-by: Keith Cirkel <keithamus@users.noreply.github.com>

Author: Trickfilm400

.gitignore

@@ -1,6 +1,6 @@
 node_modules
 coverage/
-
+.nyc_output/
 # IDEs
 .idea
 .vscode