bump axe-core, as it's now 8x faster

[paulirish]

Big win if you've ever seen the "Retrieving: Accessibility..." message for longer than you'd expect.

Fixes #630

Over in dequelabs/axe-core#240 we reported some perf issues to the axe-core team. They've now addressed them and shipped the latest version of the library.

There were pages like Promise | MDN that took A LOT of time.

• Before: 9.6 seconds
• After: 1.1 seconds

Death to forced layouts. 😀

---

Also, another win I didn't expect. The awesome team at @dequelabs also changed the runtime so that it yields to the main thread on nearly every tick of its auditing engine, which leads to a much more responsive experience:

[paulirish]

cc @robdodson

[ebidel]

⏩ 💨

[robdodson]

nice!

[robdodson]

Just started reviewing :)

Sent from GH.

[brendankenny]

travis is sloooowly catching up

[robdodson]

LGTM. Just tested it against 1156 and everything works. I can rebase 1156 if you guys would like to merge this in first

[brendankenny]

needs rebase/merge for yarn.lock

[brendankenny]

hmm, why is yarn.lock getting changed so extensively? axe-core still has no dependencies of its own...just reorganizing the same entries in a different order?

[paulirish]

hmm, why is yarn.lock getting changed so extensively? axe-core still has no dependencies of its own...just reorganizing the same entries in a different order?

my mistake. I reran a fresh install and it was adding newest matching versions of all our deps.

fixed now.

[ebidel]

Ah, I think that's what I've been doing...testing different modules for the viewer and started fresh sometimes.