relax ecd-plugin version dependency

Author: ibroadfo

package.json

@@ -25,7 +25,7 @@
     "ember-cli": "2.5.0",
     "ember-cli-app-version": "^1.0.0",
     "ember-cli-dependency-checker": "^1.2.0",
-    "ember-cli-deploy-plugin": "0.2.6",
+    "ember-cli-deploy-plugin": "^0.2.6",
     "ember-cli-htmlbars": "^1.0.3",
     "ember-cli-htmlbars-inline-precompile": "^0.3.1",
     "ember-cli-inject-live-reload": "^1.4.0",