use our own version of ember-cli (i.e. latest)

index.js

@@ -11,6 +11,8 @@ const execa = require('execa');
 const { merge } = require('lodash');
 const { lt } = require('semver');
 
+const Blueprint = require('ember-cli/lib/models/blueprint');
+
 let date = new Date();
 
 const { addonInfoFromOptions, testAppInfoFromOptions, withoutAddonOptions } = require('./src/info');
@@ -164,7 +166,7 @@ module.exports = {
         `If you see this error, please open an issue at: https://github.com/embroider-build/addon-blueprint/issues`,
     );
 
-    const appBlueprint = this.lookupBlueprint('app');
+    const appBlueprint = Blueprint.lookup('app');
 
     if (!appBlueprint) {
       throw new SilentError('Cannot find app blueprint for generating test-app!');

package.json

@@ -14,6 +14,7 @@
     "test": "pnpm --filter 'blueprint-tests' test"
   },
   "dependencies": {
+    "ember-cli": "^5.6.0",
     "ember-cli-normalize-entity-name": "^1.0.0",
     "ember-cli-string-utils": "^1.1.0",
     "execa": "^5.1.1",