Update minimum Python>=3.7.0 (#7247)

utils/general.py

@@ -295,7 +295,7 @@ def check_git_status():
     LOGGER.info(emojis(s))  # emoji-safe
 
 
-def check_python(minimum='3.6.2'):
+def check_python(minimum='3.7.0'):
     # Check current python version vs. required python version
     check_version(platform.python_version(), minimum, name='Python ', hard=True)