ReleaseProcedure.txt

- Check nothing is left pending in the milestone
- Update the version number in appveyor.yml, buildcommon.xml and NHibernate.Caches.props
- Update readme.md with the list of issues fixed in the milestone
- Update the <PackageReleaseNotes> nodes of .csproj files published as NuGet packages
- Commit and PR the above
- Draft a release on GitHub
- If the PR CI build is good, merge and wait for the master CI build
- Download the artifacts from the release job of the master CI build
- Push the NuGet packages
- Add the binary zip to the GitHub release and publish it