Update dependency qunit to v2.18.1

package.json

@@ -126,7 +126,7 @@
     "postcss-custom-media": "8.0.0",
     "postcss-nested": "5.0.6",
     "prettier": "2.6.0",
-    "qunit": "2.18.0",
+    "qunit": "2.18.1",
     "qunit-console-grouper": "0.3.0",
     "qunit-dom": "2.0.0",
     "webpack": "5.70.0"

yarn.lock

@@ -12118,10 +12118,10 @@ [email protected]:
     ember-cli-babel "^7.23.0"
     ember-cli-version-checker "^5.1.1"
 
-[email protected].0:
-  version "2.18.0"
-  resolved "https://registry.yarnpkg.com/qunit/-/qunit-2.18.0.tgz#5a3efc8ee609e9d8f207a1ad317a9b02bb14bc6b"
-  integrity sha512-Xw/zUm5t1JY8SNErki/qtw4fCuaaOZL+bPloZU+0kto+fO8j1JV9MQWqXO4kATfhEyJohlsKZpfg1HF7GOkpXw==
+[email protected].1:
+  version "2.18.1"
+  resolved "https://registry.yarnpkg.com/qunit/-/qunit-2.18.1.tgz#9e90e7798216f7275c351c88652816d491391397"
+  integrity sha512-A2Adgr/DeMQOJZFVllyQi2wiGJVVXGSRRwMe39fNfuuftUYHHpGRTWUhBa8wNblunCAOUCt+1uFcg1L7NaxQTA==
   dependencies:
     commander "7.2.0"
     node-watch "0.7.3"