Update dependency qunit to v2.19.4

Author: renovate[bot]

Diff for: assets/jquery/package.json

@@ -56,7 +56,7 @@
     "native-promise-only": "0.8.1",
     "promises-aplus-tests": "2.1.2",
     "q": "1.5.1",
-    "qunit": "2.9.2",
+    "qunit": "2.19.4",
     "raw-body": "2.3.3",
     "requirejs": "2.3.6",
     "sinon": "2.3.7",