fix(ci): build PyPI artifacts in pypi-dist/ to avoid dist/scripts collision

The pypa/gh-action-pypi-publish action uploads everything in its
packages-dir, but dist/scripts/ already exists in the repo as the
location of helper scripts referenced by setup.py. Twine's metadata
check rejected dist/scripts as an unknown distribution format and the
publish step failed before uploading anything.

Build sdist/wheel into pypi-dist/ instead and point the action there.

Signed-off-by: Gabriel Harris-Rouquette <gabizou@me.com>

Author: gabizou

.github/workflows/build.yml

@@ -65,9 +65,11 @@ jobs:
           ./node_modules/.bin/gulp clean
           ./node_modules/.bin/gulp theme:build
     - name: Setup for publishing
-      run: python setup.py sdist bdist_wheel
+      run: python setup.py sdist bdist_wheel --dist-dir=pypi-dist
     - name: Publish
       uses: pypa/gh-action-pypi-publish@release/v1
+      with:
+        packages-dir: pypi-dist
 
   publish-docker:
     runs-on: ubuntu-latest