Fix build script. The shadow jar wasn't reobfuscated properly.
Add placeholder license, bump patch number, add version range dependency on Forge and add some missing @Side annotations (thanks to RWTema's SideChecker tool).
Also check reaction when checking if a target is still valid.
Throw error when trying to set reaction to hostile towards Creeper or Ghasts. Closes #52
Update to MobTalkerScript 2.3.1