Update highlight.js 9.1.0 → 9.3.0

[chibicode]

Also updated tests.

[wooorm]

Thanks!

In the future, please add comments to your PR regarding why you did what; e.g., the trim in the tests, and why almost all from the js-jsx test was removed.

And, for lowlight in particular, which is basically a rewrite of hljs, every commit to src/highlight.js also needs to be included for an update.

[chibicode]

@wooorm thanks and sorry about that, I will the next time. Just FYI:

• I added trim because the test for http was failing on one thing, which was the trailing space in the test fixture. I assumed this was an issue w/ processing of the file and not lowlight itself, so I made sure that the input/output has no trailing spaces.
• As for JSX, I meant to write a comment on this but forgot - on highlight.js 9.1.0 to 9.3.0 they simplified the test case: highlightjs/highlight.js@e5d2123 - so I tried this, but I couldn't get this test case to pass (the output diff was slightly different). After banging my head for about an hour, I incorrectly assumed that lowlight was just a thin wrapper of highlight, so I thought one test case would suffice.

And, for lowlight in particular, which is basically a rewrite of hljs, every commit to src/highlight.js also needs to be included for an update.

I didn't realize that lowlight was a rewrite - thought it was just a thin wrapper, and now it makes sense why the JSX test was failing.

I've ended up using prism because according to this thread Prism handles JSX better: highlightjs/highlight.js#931 but when I get time I'll make a new PR for lowlight.