Release 3.1.0 (2021/02/12)

• added support for MultiChannel put and monitor
• added PvValueAlarm, PvControl, and NtScalar wrapper classes
• fixed numpy initialization problem
• added error handling to RpcServer class
• added copy method to PvObject class
• conda/pip package dependencies:
  • EPICS BASE = 7.0.4.1
  • BOOST = 1.72.0
  • NUMPY > 1.15