ci: report warnings on test typechecking 3.9

Author: KyleKing

tests/__init__.py

@@ -1,7 +1,8 @@
 import sys
 from os import environ, getenv
 
+# Required for consistent test output
 environ['COLUMNS'] = '120'
 
-DEF_MODE = 'ERROR' if sys.version_info >= (3, 9) else 'WARNING'
+DEF_MODE = 'ERROR' if sys.version_info >= (3, 10) else 'WARNING'
 environ['RUNTIME_TYPE_CHECKING_MODE'] = getenv('RUNTIME_TYPE_CHECKING_MODE', DEF_MODE)