mypy tweaks, refs #289, #266, #37

.github/workflows/test.yml

@@ -25,8 +25,7 @@ jobs:
           ${{ runner.os }}-pip-
     - name: Install dependencies
       run: |
-        pip install -e '.[test]'
-        pip install mypy
+        pip install -e '.[test,mypy]'
     - name: Optionally install numpy
       if: matrix.numpy == 1
       run: pip install numpy

setup.py

@@ -27,6 +27,7 @@ setup(
     extras_require={
         "test": ["pytest", "black", "hypothesis"],
         "docs": ["sphinx_rtd_theme", "sphinx-autobuild"],
+        "mypy": ["mypy", "types-click", "types-tabulate"],
     },
     entry_points="""
         [console_scripts]