fix(combat): prevent using passive skills in simple attack technique

fix(combat): return use skill operation finished in case of an error

fix(combat): prevent quitting before an operation is finished

chore(combat): remove unused code

feat(combat): update operations to be non-blocking, add support for handling waiting

chore: use specific errors instead of GenericError

chore: add async analyzer and meet its standards

chore: update versions

feat(game): put friends, group, inventory, skills in Game instead of Character

chore: update versions

chore: make updates to get rid of warnings

chore: update versions

feat(combat): support self targeted and area skills

fix(game): make effects vnum short instead of long

fix(combat): do not return successfully when walk position is equal to target position

chore: bump versions to support new PacketSerializer

Merge pull request #32 from Rutherther/combat

Add combat extension

chore: update versions

feat(combat): remove item selector from simple attack technique

fix(combat): wait for a second after casting a skill

This seems to be the "reload" period needed until
the character may move again