fix(packets): add header for st sub packet

feat(packets): add support for st buff vnums with levels

Merge pull request #32 from Rutherther/combat

Add combat extension

fix(packets): Add new unknown field to ski packet, make rank of SkiSubPacket optional

fix(packets): make skill effect in SuPacket nullable

fix(packets): make su skill effect nullable

fix(packets): make correct fields in drop packet

fix(packets): make st packet buff vnums a read only list instead of list

fix(packets): make cancel unknown nullable

fix(packets): make cinfo icon short

fix(packets): make eq packet size optional

feat(packets): add cancel packet

feat(packets): make position in su packet short

fix(packets): make correct types in gp packet

fix(packets): make correct inner separator in eq sub packet

fix(packets): make repuration icon signed

Revert "feat(packets): make position ushort"

This reverts commit 8610668d17586fc8d502d8c86842af9504729c7a.

feat(packets): make position ushort

Merge pull request #8 from Rutherther/game-objects

Game objects

feat(packets): add sp point and cooldown packets