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 clist packet tests

feat(packets): add many new packets

Merge pull request #34 from Rutherther/tests

Add core tests

fix(tests): add needed using

fix(tests): add default packet serializers

feat(tests): add player test with 0 UpgradeRareSubPacket

chore: update tests

fix: correct usings

chore: move PacketSerializer types to correct namespace

Merge pull request #32 from Rutherther/combat

Add combat extension

feat(tests): add Ski packet test

Merge pull request #8 from Rutherther/game-objects

Game objects

feat(samples): add sample with loading data from a file

docs: remove see converter from packet tests

feat(tests): add tests for bool and string converters

fix(tests): test null values correctly