Bump mypy and pytest (#406)

Author: AlexWaygood

pyproject.toml

@@ -64,9 +64,9 @@ dev = [
     "flake8-bugbear==23.6.5",
     "flake8-noqa==1.3.2",
     "isort==5.12.0",            # Must match .pre-commit-config.yaml
-    "mypy==1.4.0",
+    "mypy==1.4.1",
     "pre-commit-hooks==4.4.0",  # Must match .pre-commit-config.yaml
-    "pytest==7.3.2",
+    "pytest==7.4.0",
     "types-pyflakes<4",
 ]