chore(deps): update dependency ember-inflector to v6

Author: renovate[bot]

packages/test-app/package.json

@@ -55,7 +55,7 @@
     "ember-disable-prototype-extensions": "1.1.3",
     "ember-engines": "0.12.0",
     "ember-engines-router-service": "0.6.0",
-    "ember-inflector": "5.0.2",
+    "ember-inflector": "6.0.0",
     "ember-load-initializers": "2.1.2",
     "ember-maybe-import-regenerator": "1.0.0",
     "ember-qunit": "7.0.0",