Actions to build debs - Githubissues

Still todo:

[x] Only build if all the tests passed
[x] Serve up a repo via GH pages - See changes in https://github.com/peternewman/Date-Holidays-GB/compare/actions...peternewman:actions-gh-pages-apt
[ ] Update gh-pages README.md at the same time, e.g. using https://github.com/marketplace/actions/copy-to-branches-action
[ ] Ideally somehow tweak the GH pages Readme to mention the repo too
[ ] Auto-build on new tags
[ ] Possibly auto-build "regularly" to auto-update new holiday dates. Although it would need to auto-release new updates too then

mjemmeson / Date-Holidays-GB