Merge pull request #4 from magieno/update-sdk-3.0

updated the github actions script.

Author: etiennenoel

.github/workflows/build.yml

@@ -26,6 +26,7 @@ jobs:
           node-version: ${{ matrix.node-version }}
           registry-url: https://registry.npmjs.org
           scope: '@awslabs-community-fork'
+      - run: npm install -g npm@latest
       - run: npm ci
         env:
           NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
@@ -49,7 +50,7 @@ jobs:
         uses: actions/setup-node@v2
         with:
           always-auth: true
-          node-version: ${{ matrix.node-version }}
+          node-version: 14.x
           registry-url: https://registry.npmjs.org
           scope: '@awslabs-community-fork'
       - run: npm install -g npm@latest