chore(deps): update dependency ember-cli-htmlbars to v7

Author: renovate[bot]

packages/test-app/package.json

@@ -72,7 +72,7 @@
     "ember-cli-app-version": "7.0.0",
     "ember-cli-babel": "8.2.0",
     "ember-cli-dependency-checker": "3.3.3",
-    "ember-cli-htmlbars": "6.3.0",
+    "ember-cli-htmlbars": "7.0.0",
     "ember-cli-inject-live-reload": "2.1.0",
     "ember-cli-sri": "2.1.1",
     "ember-cli-terser": "4.0.2",