Merge pull request #559 from fabscale/dependabot/npm_and_yarn/ember-source-5.9.0

chore(deps-dev): bump ember-source from 5.8.0 to 5.9.0

Author: github-actions[bot]

package.json

@@ -55,7 +55,7 @@
     "ember-prism": "~0.13.0",
     "ember-qunit": "~5.1.5",
     "ember-resolver": "~9.0.1",
-    "ember-source": "~5.8.0",
+    "ember-source": "~5.9.0",
     "ember-source-channel-url": "~3.0.0",
     "ember-template-lint": "~5.13.0",
     "ember-try": "~2.0.0",