MAINT: fix minimum mocpy version in test config

Author: bsipocz

tox.ini

@@ -53,7 +53,7 @@ deps =
     oldestdeps: keyring==15.0
     oldestdeps: pytest==7.4
     oldestdeps: beautifulsoup4==4.9
-    oldestdeps-alldeps: mocpy==0.9
+    oldestdeps-alldeps: mocpy==0.12
     oldestdeps-alldeps: regions==0.5
 
     online: pytest-custom_exit_code