add code style checks to github workflows

.github/workflows/test.yml

@@ -2,27 +2,54 @@ name: Makefile CI
 
 on:
   push:
-    branches: [ master ]
+    branches: [ main ]
   pull_request:
-    branches: [ master ]
+    branches: [ main ]
 
 jobs:
   build:
-
     runs-on: ubuntu-latest
-
     steps:
     - uses: actions/checkout@v2
-
     - name: Set up Python 3.9
       uses: actions/setup-python@v2
       with:
         python-version: 3.9
-
     - name: Install Dependencies
       run: |
         python -m pip install --upgrade pip
         pip install -r requirements.txt
-
     - name: Run Tests
       run: make test
+
+  isort:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Python 3.9
+      uses: actions/setup-python@v2
+      with:
+        python-version: 3.9
+    - name: Install Dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install isort
+        pip install -r requirements.txt
+    - name: Run isort
+      run: isort -c .
+
+  black:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Python 3.9
+      uses: actions/setup-python@v2
+      with:
+        python-version: 3.9
+    - name: Install Dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install black
+        pip install -r requirements.txt
+    - name: Run black
+      run: black --check .