ci: Install dependency setuptools_scm.

Signed-off-by: Michael Seifert <[email protected]>

Author: seifertm

.github/workflows/main.yml

@@ -29,7 +29,7 @@ jobs:
           set -xe
           python -VV
           python -m site
-          python -m pip install --upgrade pip wheel
+          python -m pip install --upgrade pip setuptools_scm wheel
           python -m pip install --upgrade coverage[toml] virtualenv tox tox-gh-actions
       - name: "Run tox targets for ${{ matrix.python-version }}"
         run: "python -m tox"
@@ -57,7 +57,7 @@ jobs:
           python-version: "3.9"
 
       - name: "Install poetry, check-wheel-content, and twine"
-        run: "python -m pip install wheel twine check-wheel-contents"
+        run: "python -m pip install check-wheel-contents setuptools_scm twine wheel"
       - name: "Build package"
         run: "python setup.py sdist bdist_wheel"
       - name: "List result"