Bump ember-template-lint

Author: kategengler

package.json

@@ -104,7 +104,7 @@
     "ember-source": "~4.12.0",
     "ember-styleguide": "^11.0.3",
     "ember-svg-jar": "^2.4.2",
-    "ember-template-lint": "^5.7.2",
+    "ember-template-lint": "^7.9.3",
     "ember-test-selectors": "^6.0.0",
     "ember-tether": "3.1.0",
     "ember-truth-helpers": "^4.0.3",