Set proper version when UMF downloaded from GitHub

[lukaszstolarczuk]

When UMF is downloaded from GitHub (either from Releases or via "Download ZIP" button while browsing the repo) does not contain proper UMF version, hence when compiled and used, the lib version is set to libumf.so.0.0.0 instead of a proper version (e.g. libumf.so.0.10.0).

We should set proper versioning in such case.

[lukaszstolarczuk]

closing as duplicate (ref. #619)