Update setup.py to install on latest Rasberry Pi OS (based on Debian 11)

setup.py

@@ -16,9 +16,9 @@ setup(
         'console_scripts': ['darkmute = darkmute:dark_mute'],
     },
     install_requires=[
-        "RPi.GPIO==0.6.3",
-        "snapcast==2.0.8",
-        "zeroconf==0.20.0"
+        "RPi.GPIO>=0.6.3",
+        "snapcast>=2.0.8",
+        "zeroconf>=0.20.0"
     ],
     classifiers=[
         "License :: OSI Approved :: MIT License",