Add installation steps to bump

.github/workflows/bump.yaml

@@ -29,15 +29,26 @@ jobs:
         with:
           fetch-depth: 0
           token: "${{ secrets.PERSONAL_ACCESS_TOKEN }}"
+      # towncrier imports the package as part of building so just do the full
+      # setup here
+      - uses: ./.github/actions/setup
+        with:
+          python-version: "3.11"
+          venv-id: "bump"
+          # another test that we can import if we only install the main library
+          poetry-dependency-install-flags: "--only main"
+      - name: Install towncrier
+        run: |
+          poetry run pip install towncrier
       - name: Create bump and changelog
 
         run: |
           BASE_VERSION=`poetry version -s`
           NEW_VERSION=`poetry version -s $BUMP_RULE`
-          towncrier build --yes --version v$NEW_VERSION
+          poetry run towncrier build --yes --version v$NEW_VERSION
 
-          git config --global user.name "${{ env.GITHUB_ACTOR }}"
-          git config --global user.email "${{ env.CI_COMMIT_EMAIL }}"
+          git config --global user.name "${{ GITHUB_ACTOR }}"
+          git config --global user.email "${{ vars.CI_COMMIT_EMAIL }}"
 
           git commit -a -m "bump: version $BASE_VERSION -> $NEW_VERSION"
           git tag v$NEW_VERSION