Removing jQuery

[roblarsen]

Closes #2215

(I'll write up a super great commit message when I merge this in)

Additionally, this commit updates Modernizr (I was in the gulpfile and was reminded that they just released) I know! I know. Why not make a big change-set bigger, I always say.

to do

• Tests!
• Write it up! Both cleaning up the docs and writing up the reasoning.

[roblarsen]

• Maybe put together a little script to add it back in on demand? It wouldn't be that bad. npm install, use variations on old gulp tasks to move it to dist and and then add the snippet back in. 🤔

I'm going to add a couple of gulp tasks for this kind of thing in a separate branch. I'm going to look at the docs again and then merge this in

[roblarsen]

Pulling this in since it will end up, from a Docs perspective, being an interim step (more on that soon 🤔 )

[lovetingyuan]

wow, awesome