add mypy pytype and unittest_noextras as gh actions

Author: parthea

.github/workflows/mypy.yml

@@ -0,0 +1,22 @@
+on:
+  pull_request:
+    branches:
+      - main
+name: mypy
+jobs:
+  mypy:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v2
+    - name: Setup Python
+      uses: actions/setup-python@v2
+      with:
+        python-version: "3.8"
+    - name: Install nox
+      run: |
+        python -m pip install --upgrade setuptools pip wheel
+        python -m pip install nox
+    - name: Run mypy
+      run: |
+        nox -s mypy

.github/workflows/pytype.yml

@@ -0,0 +1,22 @@
+on:
+  pull_request:
+    branches:
+      - main
+name: pytype
+jobs:
+  pytype:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v2
+    - name: Setup Python
+      uses: actions/setup-python@v2
+      with:
+        python-version: "3.8"
+    - name: Install nox
+      run: |
+        python -m pip install --upgrade setuptools pip wheel
+        python -m pip install nox
+    - name: Run pytype
+      run: |
+        nox -s pytype

.github/workflows/unittest-noextras.yml

@@ -0,0 +1,25 @@
+on:
+  pull_request:
+    branches:
+      - main
+name: unit_noextras
+jobs:
+  unit_noextras:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python: ['3.6', '3.10']
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v2
+    - name: Setup Python
+      uses: actions/setup-python@v2
+      with:
+        python-version: ${{ matrix.python }}
+    - name: Install nox
+      run: |
+        python -m pip install --upgrade setuptools pip wheel
+        python -m pip install nox
+    - name: Run unit tests; hold the extras
+      run: |
+        nox -s unit_noextras-${{ matrix.python }}