Fix publishing to pypi for pyproject.toml (#61)

We moved from setup.py to pyproject.toml, so we have to adapt our
publishing pipeline.

Author: mristin

.github/workflows/publish-to-pypi.yml

@@ -7,7 +7,7 @@ on:
 
   push:
     branches:
-      - '*/fixed-publishing-to-pypi'
+      - '*/Fix-publishing-to-pypi*'
 
 jobs:
   deploy:
@@ -25,12 +25,12 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install setuptools wheel twine
+        pip install setuptools wheel twine build
 
     - name: Build and publish
       env:
         TWINE_USERNAME: "__token__"
         TWINE_PASSWORD: ${{ secrets.PYPI_TOKEN }}
       run: |
-        python setup.py sdist
+        python -m build
         twine upload dist/*