bump node version to 20

Author: kentcdodds

Diff for: .github/workflows/validate.yml

@@ -19,12 +19,12 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - name: ⬇️ Checkout repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: ⎔ Setup node
-        uses: actions/setup-node@v3
+        uses: actions/setup-node@v4
         with:
-          node-version: 18
+          node-version: 20
 
       - name: ▶️ Run setup script
         run: npm run setup
@@ -43,10 +43,10 @@ jobs:
 
     steps:
       - name: ⬇️ Checkout repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: 🎈 Setup Fly
-        uses: superfly/flyctl-actions/setup-flyctl@v1.4
+        uses: superfly/flyctl-actions/setup-flyctl@v1.5
 
       - name: 🚀 Deploy
         run: flyctl deploy --remote-only