1. Test windows build using mingw:
$ re2c/autogen.sh
$ re2c/build_mingw.sh
$ cd re2c/.build_mingw
$ make wtests
$ cd ../..
2. Edit the following files:
CHANGELOG
3. Run release script:
$ ./release.sh <version>
4. Update version to .dev
5. Attach tarball (built with release.sh) to autogenerated release on github