Run linting and formatting check in parallel before test

.github/workflows/default.yml

@@ -1,5 +1,4 @@
-# This workflow will install Python dependencies, run tests and lint with a single version of Python
-# For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions
+# Workflow lints, and checks format in parallel then runs tests on all platforms
 
 name: Default CI/CD
 
@@ -10,7 +9,41 @@ on:
     branches: [ master ]
 
 jobs:
-  build:
+  lint:
+    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 -r requirements-extra.txt
+    - name: Lint with flake8
+      run: |
+        flake8 .
+    - name: Check format with black
+      run: |
+        black .
+  format:
+    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 -r requirements-extra.txt
+    - name: Check format with black
+      run: |
+        black .
+  test:
+    needs: [lint, format]
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
@@ -18,9 +51,13 @@ jobs:
         python-version: [3.6, 3.7, 3.8, 3.9]
         exclude:
           - os: macos-latest
-            python-version: [3.6, 3.7]
+            python-version: 3.6
+          - os: macos-latest
+            python-version: 3.7
           - os: windows-latest
-            python-version: [3.6, 3.7]
+            python-version: 3.6
+          - os: windows-latest
+            python-version: 3.7
 
     steps:
     - uses: actions/checkout@v2
@@ -32,12 +69,6 @@ jobs:
       run: |
         python -m pip install --upgrade pip
         pip install -r requirements.txt -r requirements-extra.txt
-    - name: Lint with flake8
-      run: |
-        flake8 .
-    - name: Check format with black
-      run: |
-        black .
     - name: Build python modules
       run: |
         python build.py --modules