4 - Run maint/abi-check-exports. No symbols should be listed except for _init
5 and friends. Otherwise, run maint/abi-map-symbols, update maint/libucw.abi
6 accordingly, and call maint/abi-rename symbols to fix headers.
8 - Update version numbers and ABI suffix in ucw/default.cfg:
9 - If there were major changes, or changes which are not backward
10 compatible on source level, increase the major number.
11 - If new features were added, increase the minor number.
12 - Otherwise, increase only the third number.
13 - If anything in the ABI was changed, update UCW_ABI_SUFFIX.
15 - git-tag vX.Y.Z && git push --tags