feat(update-axe-core): peerDependency validation (#201)

This makes update-axe-core compatible with Jazzband, where
`@deque/jazzband-utils` uses a peerDependency like `"axe-core": ">=4"`,
but will continue to demand human review for cases that would require a
human to think about an actual update.

No QA required

.github/actions/update-axe-core-v1/README.md

@@ -4,7 +4,8 @@ A GitHub action for updating axe-core to the latest stable version.
 
 - It updates `package.json`, `yarn.lock`, and `package-lock.json`.
 - It is compatible with both workspaces and non-workspaces monorepos.
-- It handles dependencies and devDependencies.
+- It auto-updates dependencies and devDependencies.
+- It validates that peerDependency ranges satisfy the new version.
 - It maintains whatever pinning strategy was already in place (`~`, `^`, or `=`).
 - It does _not_ commit changes or create a PR.