force 3.9 wheel creation

Author: mr-c

.github/workflows/wheels.yml

@@ -14,11 +14,13 @@ jobs:
       with:
         pre-build-command: source .github/workflows/wheel-prep.sh
         build-requirements: mypy -rrequirements.txt
+        python-version: cp36-cp36m cp37-cp37m cp38-cp38 cp39-cp39
     - name: Build manylinux2014 Python wheels
       uses: RalfG/[email protected]_x86_64
       with:
         pre-build-command: source .github/workflows/wheel-prep.sh
         build-requirements: mypy -rrequirements.txt
+        python-version: cp36-cp36m cp37-cp37m cp38-cp38 cp39-cp39
     - name: Move audited wheels to new directory
       run: mkdir audited_wheels && cp dist/*-manylinux*.whl audited_wheels/
     - name: Publish wheels to PyPI