Update version to 12.0.1-beta2
Update version to 12.0.1-beta2

ze-pequeno/Newtonsoft.Json,jkorell/Newtonsoft.Json,oxwanawxo/Newtonsoft.Json,JamesNK/Newtonsoft.Json,bfriesen/Newtonsoft.Json,PKRoma/Newtonsoft.Json,TylerBrinkley/Newtonsoft.Json