fix: limit npm to <10.0.0 on node v14 and v16 (#4111)

.github/workflows/unit-test.yml

@@ -27,6 +27,11 @@ jobs:
           node-version: ${{ matrix.node_version }}
 
       - run: npm install -g npm@latest
+        if: ${{ matrix.node_version == '18' || matrix.node_version == '20' }}
+
+      # npm@10.0.0 drops support for Node.js v14 and v16
+      - run: npm install -g npm@"<10.0.0"
+        if: ${{ matrix.node_version == '14' || matrix.node_version == '16' }}
 
       - name: restore lerna
         id: cache
@@ -70,7 +75,7 @@ jobs:
 
       - uses: actions/setup-node@v3
         with:
-          node-version: '16'
+          node-version: '18'
 
       - run: npm install -g npm@latest
 
@@ -98,6 +103,8 @@ jobs:
           npm run compile
 
       - name: Unit tests
+        env:
+         NODE_OPTIONS: --openssl-legacy-provider
         run: npm run test
   browser-tests:
     runs-on: ubuntu-latest