[BUG] Podcasts are not displayed

[KieranBond]

Describe the bug

When listening to a Podcast, the UI doesn't display the Podcast.

Whilst the controls (Play/Pause) are correct, none of the information displayed is correct and is stuck on what was previously shown.

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To Reproduce

Steps to reproduce the behavior:

1. Go to any Podcast on Spotify
2. Click on play for any episode.
3. Ensure the MiniSpotify App is running.
4. See error

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Expected behavior

It's expected that the UI will display correctly for a Podcast, as it's just audio playback.

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Screenshots

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Desktop (please complete the following information):

• OS: Windows 10
• Release 1.4, v2.4

[KieranBond]

This can now be done!

Spotify finally fixed their API a bit and now it has 'Tracks' and 'Episodes' as separate things.

#36 updates the API package we use that includes these changes too.