Add eslint-plugin-qunit

js/tests/unit/.eslintrc.json

 {
   "extends": [
-    "../../../.eslintrc.json"
+    "../../../.eslintrc.json",
+    "plugin:qunit/recommended"
   ],
   "parserOptions": {
     "ecmaVersion": 5,

package-lock.json

@@ -4171,6 +4171,27 @@
         }
       }
     },
+    "eslint-plugin-qunit": {
+      "version": "6.2.0",
+      "resolved": "https://registry.npmjs.org/eslint-plugin-qunit/-/eslint-plugin-qunit-6.2.0.tgz",
+      "integrity": "sha512-KvPmkIC2MHpfRxs/r8WUeeGkG6y+3qwSi2AZIBtjcM/YG6Z3k0GxW5Hbu3l7X0TDhljVCeBb9Q5puUkHzl83Mw==",
+      "dev": true,
+      "requires": {
+        "eslint-utils": "^3.0.0",
+        "requireindex": "^1.2.0"
+      },
+      "dependencies": {
+        "eslint-utils": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/eslint-utils/-/eslint-utils-3.0.0.tgz",
+          "integrity": "sha512-uuQC43IGctw68pJA1RgbQS8/NP7rch6Cwd4j3ZBtgo4/8Flj4eGE7ZYSZRN3iq5pVUv6GPdW5Z1RFleo84uLDA==",
+          "dev": true,
+          "requires": {
+            "eslint-visitor-keys": "^2.0.0"
+          }
+        }
+      }
+    },
     "eslint-plugin-unicorn": {
       "version": "36.0.0",
       "resolved": "https://registry.npmjs.org/eslint-plugin-unicorn/-/eslint-plugin-unicorn-36.0.0.tgz",
@@ -9584,6 +9605,12 @@
       "integrity": "sha512-NKN5kMDylKuldxYLSUfrbo5Tuzh4hd+2E8NPPX02mZtn1VuREQToYe/ZdlJy+J3uCpfaiGF05e7B8W0iXbQHmg==",
       "dev": true
     },
+    "requireindex": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/requireindex/-/requireindex-1.2.0.tgz",
+      "integrity": "sha512-L9jEkOi3ASd9PYit2cwRfyppc9NoABujTP8/5gFcbERmo5jUoAKovIC3fsF17pkTnGsrByysqX+Kxd2OTNI1ww==",
+      "dev": true
+    },
     "requires-port": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/requires-port/-/requires-port-1.0.0.tgz",

package.json

@@ -108,6 +108,7 @@
     "eslint": "^7.32.0",
     "eslint-config-xo": "^0.38.0",
     "eslint-plugin-import": "^2.24.2",
+    "eslint-plugin-qunit": "^6.2.0",
     "eslint-plugin-unicorn": "^36.0.0",
     "find-unused-sass-variables": "^3.1.0",
     "glob": "^7.1.7",