cli: Should allow future grunt-init templates.

external/cli/package.json

@@ -34,7 +34,7 @@
     "test": "mocha"
   },
   "dependencies": {
-    "@ambers/grunt-init-amber-project": "^0.21.1",
+    "@ambers/grunt-init-amber-project": ">=0.21.1",
     "@ambers/sdk": ">=0.10.5",
     "amber": ">=0.14.17",
     "bower": "^1.6.0"