Fix installs on Node < 16

Author: eps1lon

.github/workflows/validate.yml

@@ -37,6 +37,9 @@ jobs:
         with:
           node-version: ${{ matrix.node }}
 
+      - name: Pin NPM
+        run: npm install -g [email protected]
+
       - name: 📥 Download deps
         uses: bahmutov/npm-install@v1
         with:
@@ -73,6 +76,9 @@ jobs:
         with:
           node-version: 14
 
+      - name: Pin NPM
+        run: npm install -g [email protected]
+
       - name: 📥 Download deps
         uses: bahmutov/npm-install@v1
         with: