[BUG] Audio Metadata Parse errors

[NeonDaniel]

Description

As reported on Matrix, some audio files are not being properly parsed.

Steps to Reproduce

• Add a file with 'track' metadata like 1/17
• On track load, the skill will log warnings that it expected a numeric string

Relevant Code

https://github.com/NeonGeckoCom/skill-local_music/blob/dev/util/__init__.py#L160

Other Notes

iTunes parsed music (m4a containers) raises some additional KeyErrors:

• ©alb
• TIT2
• TALB
• trkn

[NeonDaniel]

Looks like there is some parsing of / in track numbers in the dev branch; updating to that version may solve some issues