update ember-cli devDependency for tests

Author: mansona

package.json

@@ -58,7 +58,7 @@
     "common-tags": "^1.8.0",
     "console-ui": "^2.2.2",
     "core-object": "^3.1.5",
-    "ember-cli": "~3.3.0",
+    "ember-cli": "~3.26.1",
     "ember-cli-dependency-checker": "^3.0.0",
     "ember-cli-eslint": "^4.2.3",
     "ember-cli-htmlbars": "^2.0.3",