update qunit

Author: zloirock

package.json

@@ -51,7 +51,7 @@
     "promises-aplus-tests": "^2.1.2",
     "puppeteer": "^5.5.0",
     "semver": "^7.3.2",
-    "qunit": "^2.12.0",
+    "qunit": "^2.13.0",
     "webpack": ">=4.44.2 <5"
   },
   "license": "MIT",