src/core: Add library versioning
Not sure what the desired versioning should be here. What I'm submitting:
↪ tree -a /nix/store/182q0mr2xpmh3ls832n91bxm6qx040ry-persistent-cache-cpp-1.0.7/lib/
/nix/store/182q0mr2xpmh3ls832n91bxm6qx040ry-persistent-cache-cpp-1.0.7/lib/
├── libpersistent-cache-cpp.so -> libpersistent-cache-cpp.so.1
├── libpersistent-cache-cpp.so.1 -> libpersistent-cache-cpp.so.1.0.7
└── libpersistent-cache-cpp.so.1.0.7
1 directory, 3 files
Edited by Cosima Neidahl