Update test.yml

Author: karen-avetisyan-mc

.github/workflows/test.yml

@@ -15,6 +15,7 @@ jobs:
     strategy:
       matrix:
         node-version:
+          - 15.x 
           - 16.x
           - 17.x
           - 18.x
@@ -25,6 +26,6 @@ jobs:
         uses: actions/setup-node@v1
         with:
           node-version: '${{ matrix.node-version }}'
-      - run: npm ci
+      - run: npm ci --legacy-peer-deps
       - run: npm run build --if-present
       - run: npm test