Move mypy config to pyproject.toml

Author: WhyNotHugo

pyproject.toml

@@ -25,3 +25,8 @@ addopts = """
 --color=yes
 """
 # filterwarnings=error
+
+[tool.mypy]
+ignore_missing_imports = true
+# See https://github.com/python/mypy/issues/7511:
+warn_no_return = false