added include and exclude

Author: Mohan920228

.github/workflows/execution-flow.yml

@@ -7,6 +7,12 @@ jobs:
       matrix:
         node-version: [12,13,14]
         os: [ubuntu-latest,windows-latest]
+        include:
+          - os: ubuntu-latest
+            node-version: 18
+        exclude:
+          - os: windows-latest
+            node-version: 12
     runs-on: ${{ matrix.os }}
     steps:
       - name: checkout