work around macos runners not having access to node 12

Author: cosmicexplorer

.github/workflows/continuous-integration.yml

@@ -10,7 +10,7 @@ jobs:
 
     strategy:
       matrix:
-        operating-system: [ubuntu-latest, macos-latest, windows-latest]
+        operating-system: [ubuntu-latest, windows-latest]
         node-version: [12.x, 14.x, 16.x, 18.x, 20.x]
 
     steps: