chore: Pin NPM version (#1262)

* chore: Pin NPM version

* fixup! chore: Pin NPM version

* chore: Use current Node.js release in CodeSandbox

* chore: Use highest possible Node.js version in Codesandbox

Author: eps1lon

.codesandbox/ci.json

@@ -1,5 +1,5 @@
 {
   "installCommand": "install:csb",
   "sandboxes": ["github/kentcdodds/react-testing-library-examples"],
-  "node": "14"
+  "node": "18"
 }

.github/workflows/validate.yml

@@ -43,6 +43,10 @@ jobs:
         with:
           node-version: ${{ matrix.node }}
 
+      # Ideally done by actions/setup-node: https://github.com/actions/setup-node/issues/213
+      - name: Setup package manager
+        run: npm install -g npm@9.2.0
+
       - name: 📥 Download deps
         uses: bahmutov/npm-install@v1
         with:
@@ -80,6 +84,10 @@ 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 npm@9.2.0
+
       - name: 📥 Download deps
         uses: bahmutov/npm-install@v1
         with: