fix(game): respect family sub packet nullability

feat(game): add revive handling

chore: make updates to get rid of warnings

feat(packets): add many new packets

fix(game): create character on at packet received

Merge pull request #32 from Rutherther/combat

Add combat extension

fix(game): create npc instead of monster in InResponder

Merge pull request #8 from Rutherther/game-objects

Game objects

feat(game): add handling of packets for maps and entities