Changes

Summary

1. Improve lock scopes and timeouts for DefaultShardManager (commit: c2491f1) (details)

Commit c2491f1d4cd5d2f41f3db7b3a95b8a0d672dc516 by Florian Spieß Improve lock scopes and timeouts for DefaultShardManager (commit: c2491f1)
	src/main/java/net/dv8tion/jda/api/sharding/DefaultShardManager.java (diff)
	src/main/java/net/dv8tion/jda/api/utils/MiscUtil.java (diff)
	src/main/java/net/dv8tion/jda/internal/utils/cache/ShardCacheViewImpl.java (diff)
	src/main/java/net/dv8tion/jda/internal/utils/cache/ReadWriteLockCache.java (diff)
	src/main/java/net/dv8tion/jda/internal/utils/cache/AbstractCacheView.java (diff)