Version 4.2.3: Fixed Github CI Windows and macOS builds.

.github/workflows/mac.yml

@@ -40,7 +40,7 @@ jobs:
 
   macos:
     name: MacOS
-    runs-on: macos-latest
+    runs-on: macos-12
 
     strategy:
       matrix:

.github/workflows/win.yml

@@ -80,7 +80,7 @@ jobs:
           path: ${{ env.TBUILD }}\${{ env.REPO_NAME }}
 
       - name: Python installs.
-        run: py -m pip install pywin32 six
+        run: pip3 install --upgrade pywin32 six
 
       - name: Set up environment paths.
         shell: bash