chore: Pin NPM version

Author: eps1lon

.github/workflows/validate.yml

@@ -80,6 +80,10 @@ jobs:
         with:
           node-version: 14
 
+      # Ideally done by actions/setup-node: https://github.com/actions/setup-node/issues/213
+      - name: Setup package manager
+        run: npm install -g [email protected]
+
       - name: 📥 Download deps
         uses: bahmutov/npm-install@v1
         with: