Add stubs for setuptools and typed-ast to dependencies (#1294)

Author: DanielNoord

requirements_test.txt

@@ -5,5 +5,8 @@ coverage~=5.5
 pre-commit~=2.13
 pytest-cov~=2.11
 tbump~=6.3.2
+# Type packages for mypy
 types-typed-ast; implementation_name=="cpython" and python_version<"3.8"
 types-pkg_resources==0.1.2
+types-setuptools==57.4.4
+types-typed-ast==1.5.0