ESLint Dependencies Update, Configure and Corrections

[erisu]

Platforms affected

none

What does this PR do?

• Upgrades eslint related dependencies
• Updates eslint configurations
• Fixes files that did not follow eslint configured standards

What testing has been done on this change?

• npm run eslint

[brodycj]

Looks good, adding reference to WIP PR #49 where I think most of these changes are coming from.

[brodycj]

Merged in a merge commit since I think these changes should be kept separate in the git history.

[brodycj]

P.S. A major cleanup TODO item is to use const whenever possible, kinda wish we did this to the var declarations that we touched in this PR.

[janpio]

Create an issue in apache/cordova so this can be tracked and doesn't get lost in the comments of a already merged PR @brodybits

[erisu]

@brodybits I am preparing a third PR and hopefully will submit tomorrow (JST). That will contain adding code coverage dependency, a minor folder structure change around test specs for better organization, and also a minor refactor of the test code. Refactor will cover const, let, and arrow functions if possible. etc.