Bump mypy version to fix python/mypy#13627

Author: DoctorDalek1963

setup.cfg

@@ -32,7 +32,7 @@ install_requires = file:requirements.txt
 [options.extras_require]
 all =
     flake8==5.0.4
-    mypy==0.971
+    mypy==0.981
     Pillow==9.2.0
     pycodestyle==2.9.1
     pydocstyle==6.1.1
@@ -52,7 +52,7 @@ compile =
     pyinstaller==5.3
 dev =
     flake8==5.0.4
-    mypy==0.971
+    mypy==0.981
     pycodestyle==2.9.1
     pydocstyle==6.1.1
     pytest==7.1.2