Merge pull request #51 from beeware/dependabot/github_actions/actions…

…/download-artifact-4.1.7

Bump actions/download-artifact from 4.1.5 to 4.1.7

Merge pull request #24 from beeware/support-update

Bump support package revisions.

Correct output locations of stub app builder.

Merge pull request #12 from beeware/utf-8

Remove redundant LSEnvironment declaration.

Merge pull request #11 from beeware/testcase2

Test framework v2

Update CI to push to a versioned branch.

Tweak the handling of the dev branch.

Ensure permissions are set on stub binaries.

Pin branch to Python 3.10.

Pin branch to Python 3.9.