feat: Port to javascript

[joeyguerra]

BREAKING CHANGE: Code has been ported to javascript from coffeescript.

I used https://decaffeinate-project.org

npx decaffeinate ./src
npx decaffeinate ./test

And then I modified test/stubs.js so it can be shared across the tests.

#429

Summary

Describe the goal of this PR. Mention any related Issue numbers.

Requirements (place an x in each [ ])

• I've read and understood the Contributing Guidelines and have done my best effort to follow them.
• I've read and agree to the Code of Conduct.

[salesforce-cla]

Thanks for the contribution! Before we can merge this, we need @joeyguerra to sign the Salesforce Inc. Contributor License Agreement.

[joeyguerra]

@seratch Are you available to assist in reviewing this PR? Or do you know someone who might be?

[filmaj]

Hey @joeyguerra, really appreciate you taking the time to put a pull request together, but as stated in our README, only critical security issues will be addressed and merged into this repo as this repo is no longer under active development.

For larger changes, such as this PR, I recommend keeping them to your fork.

[joeyguerra]

Hi @filmaj. Cool. Thank you for responding. I'll fork it.