v0.3.1

This release no longer supports yaml-code for activating the integration.
Remove the yaml-code and follow the steps on the integration page to activate
Minimum HA version for this new release is 0.115!

Improved error handling
#16 addressed. Added support only for numbers
#14 addressed. Getting lock/unlock to work
#19 fixed (alarm_panel error)
#20 fixed (config flow error)
Implement option to adjust update frequency (default 60 sec)
Adjusting code_format to only be digits (default 6)