npm ci, add dev deps

Author: chgeo

.github/workflows/node.js.yml

@@ -26,5 +26,5 @@ jobs:
       with:
         node-version: ${{ matrix.node-version }}
         cache: 'npm'
-    - run: npm i
+    - run: npm ci
     - run: npm run test-with-coverage

.github/workflows/release.yml

@@ -18,8 +18,7 @@ jobs:
         registry-url: https://registry.npmjs.org/
     - name: run tests
       run: |
-        npm i -g @sap/cds-dk
-        npm i
+        npm ci
         npm run test
     - name: get version
       id: package-version