Add a warning about this being the last version supporting python 3.8

Author: ianmcorvidae

meshtastic/__main__.py

@@ -811,6 +811,9 @@ def setSimpleConfig(modem_preset):
                         f"*** A newer version v{pypi_version} is available!"
                         ' Consider running "pip install --upgrade meshtastic" ***\n'
                     )
+                if sys.version_info[0] == 3 and sys.version_info[1] < 9:
+                    print("  *** this version of the CLI is the last that supports python 3.8 ***")
+                    print("  *** please update your python installation ***")
             else:
                 print("Showing info of remote node is not supported.")
                 print(

meshtastic/util.py

@@ -317,6 +317,9 @@ def support_info():
         )
     else:
         print(f" meshtastic: v{the_version}")
+    if sys.version_info[0] == 3 and sys.version_info[1] < 9:
+        print("  *** this version of the CLI is the last that supports python 3.8 ***")
+        print("  *** please update your python installation ***")
     print(f" Executable: {sys.argv[0]}")
     print(
         f" Python: {platform.python_version()} {platform.python_implementation()} {platform.python_compiler()}"