fix(ytmusic): Multiple authors/artists

[DanielKrasny]

Pull Request Template

Description

When searching on YTMUSIC client, songs and videos are returned, but it's common that they can have more than one artist or author. For that reason, albums (or views) may show the second artist as their value.
I've fixed the code so artists/authors are returned as array of strings and albums/views are returned correctly.

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have checked my code and corrected any misspellings

[LuanRT]

Merging this — do note though that this has been fixed in the new parser (see #65), which also offers better support for YouTube Music overall.

Thank you!