changed node version to 20 as pipelines were failing

Author: Nilay-squareup

.github/workflows/main.yml

@@ -7,7 +7,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
         with:
-          node-version: 16.x
+          node-version: 20.x
       - run: |
           yarn && yarn lint && yarn test && 
           cd reader-sdk-react-native-quickstart && yarn