Bump to meross 0.4.7.3 version

Migration to Python 3.13 (mandatory for HA 2025).. 3.13 is not compliant
w/ the old 4.4 release

devices/protocols/Meross/pyproject.toml

@@ -9,7 +9,7 @@ authors = [
 license = { text = "GPL License" }
 classifiers = ["Programming Language :: Python", "Topic :: Home Automation"]
 keywords = ["xaal", "meross"]
-dependencies = ["xaal.lib", "xaal.schemas", "meross_iot==0.4.4.4"]
+dependencies = ["xaal.lib", "xaal.schemas", "meross_iot==0.4.7.3"]
 
 [tool.setuptools.packages.find]
 include = ["xaal.meross"]