Unversioned shared library

[aleasto]

A shared library should have a version that represents ABI stability across potentially multiple releases. An unversioned shared library is unusable for distribution.

At a glance the ABI seems to be quite stable, judging by the fact that MPV requires dependency('mujs', version: '>= 1.0.0'.
Please consider versioning the library, you may just start now at version 1. The version shall change every time a new release breaks the ABI.

See: https://docs.fedoraproject.org/en-US/packaging-guidelines/#_downstream_so_name_versioning

[ccxvii]

Duplicate of #175