This series cleans up and modernizes the Meson code a bit:
- It adds the license SPDX name to the proper field
- Sets a minimum version, the version is fairly old, but without setting
a version then Meson will never warn about issues, including potentially
important ones like "this happens to work in some cases but wasn't
intended and doesn't work in all cases"
- uses more modern Meson features to make things easier for consumers
- Fixes the tests using the ensure_utf8 helpers by ensuring that they're
actually built, and placing them in the correct path.
- Adds the Meson test to the CI
fe92f34655