v0.7.0

Added

• Another register whitelist and check in the WriteHoldingRegisterRequest PDU as another layer of checks
  to not inadvertently write to unsafe registers. Add a test to ensure the allow list stays in sync with
  the register definitions from model.register_banks.HoldingRegister.
• A bunch of convenience methods to write data to the inverter without needing any knowledge of registers.
  See client.GivEnergyClient which has a number of set_* methods.

Changed

• Split out the end-user client functionality from the Modbus client - they were getting too entangled
  unnecessarily. Updated example code in README for reference.
• Renamed target_soc to battery_target_soc instead.