tests(game): add basic test for mates

tests(game): add support for game integration tests

tests: remove unnecessary deep checks, replace them with ShouldBeEquivalentTo from Shouldly

tests: update, fix tests

tests: fix tests for new version

Merge pull request #47 from Rutherther/feat/pass-nullable

Pass CanBeNull to string serializer and converter

chore(test): update tests

feat(tests): add tests structure

feat(tests): add clist packet tests

feat(packets): add many new packets

Merge pull request #34 from Rutherther/tests

Add core tests

fix(tests): add needed using

feat(tests): use merged HandlePacketAsync method

fix(tests): expect FakeError instead of GenericError

fix(tests): add default packet serializers

feat(tests): add tests for command processor, walk command handler, stateful injector

feat(tests): add player test with 0 UpgradeRareSubPacket

chore: update tests

fix: correct usings

chore: move PacketSerializer types to correct namespace