Transform variables

[dfilipidisz]

Continue work on #1240.

Transformed var statements to const and let, added eslint rules to enforce them.

Not included:

• Examples in docs not updated
• Test code blocks not updated

If there is anything I can do to make these large scale changes easier to handle, please let me know!

[ljharb]

Was this done manually, or solely with eslint --fix?

[dfilipidisz]

First I ran eslint ---fix than I fixed the ~15 cases where it couldn't do it by itself.

[lencioni]

Thanks!

Moving forward it would be preferable to put all of the automated changes in their own commit and follow up with commits that contain only manual changes. That would make it easier to review.

[dfilipidisz]

Okay, I'll definitely do that in the future! Thanks for guiding me along this, I don't have much experience in open source :)

[lencioni]

I don't have much experience in open source :)

You are doing a great job! Keep it up 💃