* Updated precision to follow the tenths, halves, whole notation used by
other home assistant climate modules. Added the precision @property so
that home assistant can handle this rounding in the frontend, rather
than in the _async_read_register() method.
* Fixed a pylinter error for periods in user-facing log messages, and
updated `precision` defaults in components/modbus/__init__.py to be
consistent with an error case, using `PRECISION_WHOLE`.
* revert changes to `precision:` configuration variable
instead, the climate `precision()` function will infer whether or not
to display in whole or tenths. halves will be unsupported, which should
be fine.
* re-added missing line that was removed
* revert change to use self._input_type instead of CALL_TYPE_REGISTER_HOLDING
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