Organize files

[asamuzaK]

• Created utils/camelize.js
• Put generated files under generated/
• Switched to const and let
• Updated code style rules through prettier
• Added @domenic/eslint-config rules
• Updated CSSStyleDeclaration class to match the latest spec
• Rewritten properties/*.js files
• Renamed test files -> *.test.js and added tests

Fixes #200, Fixes #201, Fixes #202, Fixes #203, Fixes #204, Fixes #205,
Fixes #206, Fixes #207, Fixes #70, Fixes #124
Also we can close #120, I think.

[asamuzaK]

@domenic
Almost ready.

Do you think we still need webkitXXX.js files under ./properties/?
Is it okay to remove them?

[domenic]

I'm not sure I understand enough project architecture to know exactly what those files are currently doing.

We need to support this part of the spec: https://drafts.csswg.org/cssom/#the-cssstyledeclaration-interface:~:text=fontSize%20IDL%20attribute.-,For%20each%20CSS%20property%20property,exceptions%20thrown%20must%20be%20re%2Dthrown.,-For%20example%2C%20if . Do those files help with that?

[asamuzaK]

I'm not sure I understand enough project architecture to know exactly what those files are currently doing.

We need to support this part of the spec: https://drafts.csswg.org/cssom/#the-cssstyledeclaration-interface:~:text=fontSize%20IDL%20attribute.-,For%20each%20CSS%20property%20property,exceptions%20thrown%20must%20be%20re%2Dthrown.,-For%20example%2C%20if . Do those files help with that?

Let's keep webkitFoo files for now.
I'll file new issue for that.