fix ember-try for ember < 4.0

Author: mansona

tests/dummy/config/ember-try.js

@@ -15,6 +15,7 @@ module.exports = async function () {
             '@ember/test-helpers': '2.7.0',
             'ember-qunit': '6.0.0',
             'ember-resolver': '8.1.0',
+            'ember-cli': '^4.12.0',
           },
         },
       },
@@ -26,6 +27,7 @@ module.exports = async function () {
             '@ember/test-helpers': '2.7.0',
             'ember-qunit': '6.0.0',
             'ember-resolver': '8.1.0',
+            'ember-cli': '^4.12.0',
           },
         },
       },
@@ -37,6 +39,7 @@ module.exports = async function () {
             '@ember/test-helpers': '2.7.0',
             'ember-qunit': '6.0.0',
             'ember-resolver': '8.1.0',
+            'ember-cli': '^4.12.0',
           },
         },
       },
@@ -46,6 +49,7 @@ module.exports = async function () {
           devDependencies: {
             'ember-source': '~3.28.0',
             'ember-resolver': '8.1.0',
+            'ember-cli': '^4.12.0',
           },
         },
       },