install setuptools

.github/workflows/tests.yml

@@ -83,7 +83,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install wheel twine
+        pip install wheel twine setuptools
     - name: Build distribution files
       run: python setup.py bdist_wheel sdist
     - name: Check distribution files
@@ -115,7 +115,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install wheel twine
+        pip install wheel twine setuptools
     - name: Check the tag
       run: |
         PACKAGE_VERSION=`python setup.py --version`