hi, eric. below PR consisting of minor changes/cleanup, with special note on first item:

• GenericTag relocated from nostr.event.impl to nostr.event.tag

for any library users explicitly using GenericTag it is technically a breaking change although i suspect all/most users use concrete tag implementations (EventTag, PubKeyTag, etc) directly, which are all unchanged.

general:

• AddressableTagFilter renamed to AddressTagFilter
• TagSerializer split into BaseTagSerializer and GenericTagSerializer implementations
• BaseTagSerializer and GenericTagSerializer extend newly introduced AbstractTagSerializer
• BaseTagEncoder updated to use BaseTagSerializer
• BaseTag.getFieldValue() potential null String result replaced with Optional
• added VoteTag & VoteTagFilter
• GenericMessage.decode() method updated to use Stream
• BaseMessageDecoder cleaned up
• added VoteTagFilter to FilterableProvider
• cleaned up SignatureDeserializer
• OkMessage.decode() cleaned up

tests:

• refactored common/useful test patterns into CommonTestObjectsFactory class
• new and updated tests added for all the above, all passing
• various gradle build/config updates

all/any concerns, questions, additional considerations, etc, welcome as always