Update ember-router-scroll

This fixes a known issue where you can get randomly failing tests.

See DockYard/ember-router-scroll#72

package.json

@@ -48,7 +48,7 @@
     "ember-keyboard": "^3.0.0",
     "ember-modal-dialog": "2.4.3",
     "ember-responsive": "^3.0.0-beta.1",
-    "ember-router-scroll": "^0.4.0",
+    "ember-router-scroll": "^0.6.0",
     "ember-svg-jar": "^0.12.0",
     "ember-tether": "^1.0.0-beta.2",
     "ember-truth-helpers": "^2.0.0",

yarn.lock

@@ -3613,9 +3613,9 @@ ember-router-generator@^1.2.3:
   dependencies:
     recast "^0.11.3"
 
-ember-router-scroll@^0.4.0:
-  version "0.4.0"
-  resolved "https://registry.yarnpkg.com/ember-router-scroll/-/ember-router-scroll-0.4.0.tgz#df833738471bc854c76fc8620853563f275e649f"
+ember-router-scroll@^0.6.0:
+  version "0.6.0"
+  resolved "https://registry.yarnpkg.com/ember-router-scroll/-/ember-router-scroll-0.6.0.tgz#e94fda377bd00c45d866123ec6dcf05654d4d987"
   dependencies:
     ember-app-scheduler "^0.2.0"
     ember-cli-babel "^6.6.0"