force pymodbus version

Author: gpulido

setup.cfg

@@ -1,6 +1,6 @@
 [metadata]
 name = python-airzone 
-version = 0.16.0
+version = 0.16.1
 description = 'Python library for interfacing with Airzone using the modbus protocol',  # Required   
 long_description = file: README.rst
 keywords = innobus, airzone, modbus, HVAC
@@ -23,7 +23,7 @@ classifiers =
 packages = find:
 
 install_requires =
-    pyModbus
+    pyModbus>=3.7.0
     pybase64
     importlib-metadata
     requests