Fix PyYAML and GitHub actions (#6)

.flake8

@@ -0,0 +1,2 @@
+[flake8]
+exclude = .git,.eggs,.venv,build,dist,__pycache__,Shakersynth.egg-info,mypy_cache,.pytest_cache

.github/workflows/build-package.yml

@@ -26,12 +26,10 @@ jobs:
       uses: actions/setup-python@v2
       with:
         python-version: '3.9'
-    - name: Install dependencies
-      run: |
-        python -m pip install --upgrade pip
-        pip install build
+    - name: Install Poetry
+      run: pip install poetry
     - name: Build package
-      run: python -m build
+      run: poetry build
     #- name: Publish package
     #  uses: pypa/gh-action-pypi-publish@27b31702a0e7fc50959f5ad993c78deac1bdfc29
     #  with:

.github/workflows/run-tests.yml

@@ -16,26 +16,25 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [3.7, 3.8, 3.9]
+        python-version: [3.9]
 
     steps:
     - uses: actions/checkout@v2
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v2
       with:
         python-version: ${{ matrix.python-version }}
-    - name: Install dependencies
-      run: |
-        pip install -r requirements.txt
+    - name: Install Poetry
+      run: pip install poetry
     - name: Install Shakersynth
       run: |
-        pip install .
+        poetry install
     - name: Lint with flake8
       run: |
-        flake8 --config=setup.cfg
+        poetry run flake8
     - name: Check with mypy
       run: |
-        mypy --config-file=setup.cfg .
+        poetry run mypy .
     - name: Test with pytest
       run: |
-        pytest --cov=shakersynth
+        poetry run pytest --cov=shakersynth