Update CDK and Node versions (#5)

.github/workflows/build.yml

@@ -12,10 +12,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - name: Use Node.js 14.x
+      - name: Use Node.js 18.x
         uses: actions/setup-node@v3
         with:
-          node-version: "14.x"
+          node-version: "18.x"
           registry-url: https://registry.npmjs.org
       - name: Install rimraf
         run: npm i -g rimraf

.github/workflows/release.yml

@@ -22,10 +22,10 @@ jobs:
         run: |
           git config --global user.email "[email protected]"
           git config --global user.name "GitHub Action"
-      - name: Use Node.js 14.x
+      - name: Use Node.js 18.x
         uses: actions/setup-node@v3
         with:
-          node-version: "14.x"
+          node-version: "18.x"
           registry-url: https://registry.npmjs.org
       - name: Install rimraf
         run: npm i -g rimraf