Created pre-submit.yml

Deleted unit-tests.yml in favor of newer [starter workflow](https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-python#using-the-python-starter-workflow)

Signed-off-by: Chimezie Iwuanyanwu <mr.chrisopher@yahoo.com>

.github/workflows/pre-submit.yml

@@ -0,0 +1,33 @@
+name: Pre-submit
+
+on: [ push ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: [ "3.7", "3.8", "3.9", "3.10" ]
+
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v4
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install dependencies
+        run: |
+          sudo apt-get install libsndfile1
+          python -m pip install --upgrade pip
+          pip install flake8 pytest
+          if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+      - name: Lint with flake8
+        run: |
+          # stop the build if there are Python syntax errors or undefined names
+          flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
+          # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
+          flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
+      - name: Test with pytest
+        run: |
+          pytest