Steps to making a new release

1. Bump version in Cargo.toml and meson.build
2. Add new release in appdata metainfo
3. Create git tag
4. Run meson dist -C builddir --no-tests
5. Make new github release, upload tarballs from meson dist.
6. Create new branch and commit for flathub project, setting new url and sha256sum.
7. Do pull request on flathub project.
8. Merge.


