Change how prismjs is loaded.

[jlebar]

• Load minified code (3kB vs 30kB)
• Add prism autoloader so that we get highlighting for languages we
  use.
• Hardcode exact prism version. Perhaps this is controversial, but it
  saves a redirect for each request, shaving off 30ms on a fast
  connection.

[kentnek]

Load minified code (3kB vs 30kB)

Aw yiss.

Add prism autoloader so that we get highlighting for languages we use.

Oh this is pretty cool, thanks for pointing this out.

Hardcode exact prism version.

We're already using 1.2 instead of 1.x.x, so changing to the exact version makes sense here too.

I'm good with this @jakewies :D

[jakewies]

Great additions! I didn't realize there was an autoloader 🤯

[jakewies]

@kentnek do you have merge perms? I think you should. If you do go ahead and merge this in and you can add @jlebar as a contributor using the @all-contributor command! If you don't have merge perms let me know and I'll figure out what to do to get you them. 😄

[jakewies]

Awesome stuff @jlebar thank you for contributing!

[kentnek]

@jakewies Oh cool let me do that!

[kentnek]

@all-contributors please add @jlebar for code.

[allcontributors]

@kentnek

I've put up a pull request to add @jlebar! 🎉