Update dependency ember-truth-helpers to v4

Author: renovate[bot]

ember/package.json

@@ -87,7 +87,7 @@
     "ember-svg-jar": "2.3.3",
     "ember-template-lint": "2.21.0",
     "ember-test-selectors": "5.0.0",
-    "ember-truth-helpers": "3.0.0",
+    "ember-truth-helpers": "4.0.3",
     "ember-web-app": "5.0.1",
     "eslint": "7.25.0",
     "eslint-config-prettier": "8.3.0",