v5.20.1 - 1.20 heads, vanilla piglin head support

[crashdemons]

This is an alpha version undergoing more rigorous testing. The following changes have been included:

Adds 1.20 heads (sniffer, camel) [from dev build 5.20.0]
Fixes Piglin heads to use the new vanilla piglin head.

NOTE: these changes appear to work on 1.20.x but still need testing on 1.8-1.12 and 1.14-1.19 to ensure they spawn a playerhead correctly.
For best results, ensure your server is running at least Java 17 until compatibility with Java 8+ can be confirmed.

The PlayerHeads API increased in version to 5.20.1 to force build compatibility, but otherwise remains compatible with 5.2.17 (see previous Release)
The Compatibility API/Library added the Piglin Head to CompatibleSkullMaterial and the SkullType shim with 5.20.1 (TBA)

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This discussion was created from the release v5.20.1 - 1.20 heads, vanilla piglin head support.