Fix emberjs/ember.js#20797

Author: NullVoxPopuli

blueprints/app/files/package.json

@@ -26,9 +26,9 @@
     "test:ember": "ember test"
   },
   "devDependencies": {
-    "@babel/core": "^7.26.0<% if (!typescript) { %>",
+    "@babel/core": "^7.26.0",
     "@babel/eslint-parser": "^7.25.9",
-    "@babel/plugin-proposal-decorators": "^7.25.9<% } %><% if (typescript) { %>",
+    "@babel/plugin-proposal-decorators": "^7.25.9<% if (typescript) { %>",
     "@ember-data/adapter": "~5.4.0-beta.12",
     "@ember-data/graph": "~5.4.0-beta.12",
     "@ember-data/json-api": "~5.4.0-beta.12",

tests/fixtures/addon/typescript/package.json

@@ -51,6 +51,8 @@
     "ember-cli-htmlbars": "^6.3.0"
   },
   "devDependencies": {
+    "@babel/eslint-parser": "^7.25.9",
+    "@babel/plugin-proposal-decorators": "^7.25.9",
     "@ember/optional-features": "^2.2.0",
     "@ember/test-helpers": "^4.0.4",
     "@embroider/test-setup": "^4.0.0",

tests/fixtures/app/typescript-embroider/package.json

@@ -27,6 +27,8 @@
   },
   "devDependencies": {
     "@babel/core": "^7.26.0",
+    "@babel/eslint-parser": "^7.25.9",
+    "@babel/plugin-proposal-decorators": "^7.25.9",
     "@ember-data/adapter": "~5.4.0-beta.12",
     "@ember-data/graph": "~5.4.0-beta.12",
     "@ember-data/json-api": "~5.4.0-beta.12",

tests/fixtures/app/typescript/package.json

@@ -27,6 +27,8 @@
   },
   "devDependencies": {
     "@babel/core": "^7.26.0",
+    "@babel/eslint-parser": "^7.25.9",
+    "@babel/plugin-proposal-decorators": "^7.25.9",
     "@ember-data/adapter": "~5.4.0-beta.12",
     "@ember-data/graph": "~5.4.0-beta.12",
     "@ember-data/json-api": "~5.4.0-beta.12",