Use note v15

Author: dgolovin

.github/workflows/continuous-integration-workflow.yml

@@ -19,7 +19,7 @@ jobs:
     strategy:
       matrix:
         os: [macos-latest, windows-latest, ubuntu-18.04]
-        node: [ '14' ]
+        node: [ '15' ]
 
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps: