Partial rework of GH actions for setuptools

.github/workflows/pythonpackage.yml

@@ -46,28 +46,27 @@ jobs:
         restore-keys: |
           ${{ runner.os }}-pip-
 
-    - name: Install poetry
+    - name: Install python build module 
       run: |
-        python -m pip install --upgrade pip
-        python -m pip install poetry
+        python -m pip install --upgrade pip build flake8 pytest
 
-    - name: Install dependencies
+    - name: Build the project
       run: |
-        python -m poetry build --format wheel
-        python -m poetry install
+        python -m build
+        pip install dist/chmpy*.whl
 
     - name: Lint (flake8)
       run: |
         # stop the build if there are Python syntax errors or undefined names
-        poetry run flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
+        python -m flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
         # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
-        poetry run flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
+        python -m flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
 
     - name: Run tests
       run: |
-        poetry run pytest
+        python -m pytest
 
     - name: Publish package to PyPI
       if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags')
       run: | 
-        python -m poetry publish -u __token__ -p ${{ secrets.PYPI_TOKEN }}
+        python -m publish -u __token__ -p ${{ secrets.PYPI_TOKEN }}