fix min python for pip-compile

requirements/tests.txt

@@ -1,11 +1,15 @@
 #
-# This file is autogenerated by pip-compile with Python 3.12
+# This file is autogenerated by pip-compile with Python 3.8
 # by the following command:
 #
 #    pip-compile tests.in
 #
 asgiref==3.8.1
     # via -r tests.in
+exceptiongroup==1.2.2
+    # via pytest
+greenlet==3.0.3 ; python_version < "3.11"
+    # via -r tests.in
 iniconfig==2.0.0
     # via pytest
 packaging==24.1
@@ -16,3 +20,7 @@ pytest==8.3.2
     # via -r tests.in
 python-dotenv==1.0.1
     # via -r tests.in
+tomli==2.0.1
+    # via pytest
+typing-extensions==4.12.2
+    # via asgiref