Move mypy configuration to pyproject.toml

Author: johnthagen

pyproject.toml

@@ -2,6 +2,10 @@
 requires = ["setuptools>=46.0", "wheel"]
 build-backend = "setuptools.build_meta"
 
+[tool.mypy]
+ignore_missing_imports = true
+strict = true
+
 [tool.black]
 line-length = 99
 target-version = ["py37", "py38", "py39", "py310"]