Bump to mypy 1.15.0

Author: SamWilsn

setup.cfg

@@ -175,7 +175,7 @@ test =
 lint =
     types-setuptools>=68.1.0.1,<69
     isort==5.13.2
-    mypy==1.14.1
+    mypy==1.15.0
     black==23.12.0
     flake8==6.1.0
     flake8-bugbear==23.12.2