Versioned library file

[Fhiss]

Please, consider providing a properly versioned library file. I want to package rapidcheck for Fedora, and according to the guidelines, an unversioned library should be shipped under no circumstances (see https://docs.fedoraproject.org/en-US/packaging-guidelines/#_devel_packages, https://docs.fedoraproject.org/en-US/packaging-guidelines/#_shared_libraries for further information).