Could not load libraries with invalid (non-semver) version

```
$ arduino-cli lib install Audio
Error: loading libs from /home/cmaglie/Workspace/sketchbook-cores-beta/libraries: loading library from /home/cmaglie/Workspace/sketchbook-cores-beta/libraries/xbee_serial_array-master: invalid version 0.9a: invalid minor version separator 'a'
Error during libraries rescan
```
