deps: update typescript and axe-core to latest

[brendankenny]

minor bump in two deps

• Only minor change from the typescript version bump is that we get to remove three // @ts-expect-errors because of improved commonjs handling (Create synthetic exports symbol for commonjs module microsoft/TypeScript#42655). Otherwise we'll now get the advantage of a few new stricter checks and improved usage of type aliases (see the TypeScript 4.2 announcement).
• axe-core update is basically transparent. I re-ran update:sample-artifacts Accessibility and after reverting the blob URLs (which randomize on every run) the only change was the version number, so that's great :)

[brendankenny]

nothing substantial changed in this, there's been so many releases because it shares a monorepo with the actual typescript-eslint plugin. If we don't update this, though, we get a giant

WARNING: You are currently running a version of TypeScript which is not officially supported by @typescript-eslint/typescript-estree.

You may find that it works just fine, or you may not.

SUPPORTED TYPESCRIPT VERSIONS: >=3.3.1 <4.2.0

YOUR TYPESCRIPT VERSION: 4.2.2

warning on every run of yarn lint :)

[brendankenny]

drive by bump of a low severity transitive dep warning that if you have enough access to exploit you might as well just run the exploit directly instead of going through the dep :) It's easy to bump and technically it's in our shipped deps, though, so, whatever.

[brendankenny]

smoke-devtools dislikes me today, so while it's figuring itself out, let's bump tsc to the new patch release :)

[brendankenny]

I'm going to temporarily circumvent smoke-devtools to get this landed since we know this isn't the cause of #12209