add py3.9 to the testing

Author: baturayo

.github/workflows/test-and-train.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.7, 3.8]
+        python-version: [3.7, 3.8, 3.9]
     steps:
       - uses: actions/checkout@v2
       - name: Set up Python ${{ matrix.python-version }}
@@ -22,8 +22,7 @@ jobs:
           python-version: ${{ matrix.python-version }}
       - name: Install dependencies
         run: |
-          python -m pip install --upgrade pip
-          python -m pip install -e ".[test]"
+          make install
       - name: Lint with flake8 & black
         run: |
           make lint
@@ -50,8 +49,7 @@ jobs:
           python-version: 3.7
       - name: Install dependencies
         run: |
-          python -m pip install --upgrade pip
-          python -m pip install -e .
+          make install
       - name: Train the model
         run: |
           make train