Ensure live region is appended to `role="dialog"` (#12)

Fixes: #13

It'd be nice to add tests for dialog scenarios we use ariaNotify in
covering `<dialog>` and `[role="dialog"]`. It doesn't look like there
are any right now - it looks a bit involved, so I will not tackle that
in this PR. Filed:
#14

fix: Set 'repository.url' in package.json (#11)

The latest [“Publish to npm” workflow
run](https://github.com/github/ariaNotify-polyfill/actions/runs/13503814665/job/37728589058)
failed with:
> npm error code E422
> npm error 422 Unprocessable Entity - PUT
https://registry.npmjs.org/@github%2farianotify-polyfill - Error
verifying sigstore provenance bundle: Failed to validate repository
information: package.json: "repository.url" is "", expected to match
"https://github.com/github/ariaNotify-polyfill" from provenance

This PR sets `repository.url` to
`"git+https://github.com/github/ariaNotify-polyfill.git"`, similar to
what we use in other repos (where similar publish workflows work).

Notably, that’s different from
`"https://github.com/github/ariaNotify-polyfill"`, the URL mentioned in
the error message above—as a result, this PR may (or may not) fix the
workflow error. If it doesn’t, then updating the value to
`"https://github.com/github/ariaNotify-polyfill"` is the obvious next
step.

feat: Remove `interrupt` and update `priority`’s values to align with…

… latest spec (#10)

Fixes #9

Merge pull request #5 from github/add--1px-margin-to-live-region-element

add -1px margin to live region element

Merge pull request #1 from github/keithamus-patch-1

Update README.md

1.0.1

add package.json