Make Black manually install

Author: alexgleith

.github/workflows/test.yml

@@ -31,6 +31,8 @@ jobs:
     - name: Run Black check for formatting
       if: ${{ matrix.python-version != '3.5' }}
       run: |
+        # Need to manually install Black while we support Python 3.5
+        pip install black
         black --check .
 
     - name: Test with pytest

setup.py

@@ -10,7 +10,8 @@
 
 TESTS_REQUIRE = [
     'pytest',
-    'black'
+    # Need to manually install Black while we support Python 3.5
+    # 'black'
 ]
 
 EXTRAS_REQUIRE = {