remove babel for jest

We can use --experimental-vm-modules.

Author: SteffenDE

.github/workflows/assets.yml

@@ -39,10 +39,10 @@ jobs:
       - name: Install Dependencies
         run: mix deps.get --only dev
 
-      - name: Set up Node.js 20.x
+      - name: Set up Node.js 24.x
         uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
         with:
-          node-version: 20.x
+          node-version: 24.x
 
       - name: Restore npm cache
         uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0

.github/workflows/ci.yml

@@ -128,10 +128,10 @@ jobs:
           restore-keys: |
             deps-${{ runner.os }}-npm
 
-      - name: Set up Node.js 20.x
+      - name: Set up Node.js 24.x
         uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
         with:
-          node-version: 20.x
+          node-version: 24.x
 
       - name: Restore npm cache
         uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0

assets/package.json

@@ -0,0 +1,3 @@
+{
+  "type": "module"
+}

babel.config.json

@@ -24,4 +24,7 @@ module.exports = {
 
   // The regexp pattern or array of patterns that Jest uses to detect test files
   testRegex: "/assets/test/.*_test\\.js$",
+
+  // The assets tree is native ESM. Disable Jest's default JS transform.
+  transform: {},
 }