Update L.ScaleAction method creation to ES6 syntax

[tannerdolby]

Fixes #619

Hey @sashadev-sky this PR is ready for your review. I updated L.ScaleAction method creation to ES6 and added commit for the dist file.

I made sure each checkbox below is checked. My local tests pass after running npm test.

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Thank you!

[welcome]

Thanks for opening this pull request! Dangerbot will test out your code and reply in a bit with some pointers and requests.
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[sashadev-sky]

@tannerdolby sorry for confusing you earlier about the dist file. It will not have any changes to it in this case because we are just updating the syntax of our code, which gets transpiled by babel anyway. So please uncommit the dist file and then ping me here for review again! Thank you :)

[tannerdolby]

@sashadev-sky no problem at all. Thank you for the update. I will uncommit the dist file here shortly and ping you for review! :)

Would you prefer me to use git revert <commit> or git rm --cached <file_name>?

[sashadev-sky]

@tannerdolby Doesn't make a difference to me!

[tannerdolby]

I reverted the commit for adding dist file. Let me know if I made any errors or need to edit anything else to get this merged!

[sashadev-sky]

Thanks this is perfect! The build is passing for node v 10, but failing for node v 12 for reasons unrelated to the changes here.

[welcome]

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[tannerdolby]

Awesome! 🎉 Thank you for such a great experience @sashadev-sky

My twitter handle is @tannerdolby