Mostly these are deprecations from the Spigot team which I believe
shouldn't be deprecated. For example, players refer to each other by
name, not UUID - so there will always be a need for player lookup by
name. Also the block IDs are a well-documented standard that everyone
understands, even if they're not very human-friendly. Plugins use those
IDs and data values to specify block types for example in config files.
As for the rest of the ignores, I either decided the warnings are just
noise based on the situation, or that I'm comfortable with the risks.
Possibly for the first time in 5 years of dev work on this plugin, I
just compiled without any warnings. :)
Rewrote and retested parts of the plugin to use UUIDs instead of player
names to uniquely identify players. Added data migration code to
convert old data to the new (UUID) format.
