Update package.json

Author: HaoK

src/Components/test/E2ETest/package.json

@@ -6,7 +6,7 @@
   "private": true,
   "scripts": {
     "selenium-standalone": "selenium-standalone",
-    "prepare": "selenium-standalone install --config selenium-config.json"
+    "prepare": "selenium-standalone install --config selenium-config.json",
     "sauce": "ts-node ./scripts/sauce.ts"
   },
   "author": "",