Arch Linux

Description:

Without `python-discid`, whipper will not run correctly when ripping.

`discid` is listed in the `requirements.txt` in upstream repository.

Additional info:

* Package version: 0.10.0-1
* https://github.com/whipper-team/whipper/blob/develop/requirements.txt

Steps to reproduce:

1. Try to rip a CD using Arch Linux's whipper package
2. The following error can be observed:

```
Traceback (most recent call last):
File "/usr/bin/whipper", line 33, in <module>
sys.exit(load_entry_point('whipper==0.10.0', 'console_scripts', 'whipper')())
File "/usr/lib/python3.9/site-packages/whipper/command/main.py", line 56, in main
ret = cmd.do()
File "/usr/lib/python3.9/site-packages/whipper/command/basecommand.py", line 141, in do
return self.cmd.do()
File "/usr/lib/python3.9/site-packages/whipper/command/basecommand.py", line 141, in do
return self.cmd.do()
File "/usr/lib/python3.9/site-packages/whipper/command/cd.py", line 116, in do
self.mbdiscid = self.ittoc.getMusicBrainzDiscId()
File "/usr/lib/python3.9/site-packages/whipper/image/table.py", line 368, in getMusicBrainzDiscId
from discid import put
ModuleNotFoundError: No module named 'discid'
```