chore(deps): update dependency start-server-and-test to ^1.15.4

Author: renovate[bot]

package.json

@@ -135,7 +135,7 @@
     "react-spring": "^9.4.4",
     "react-twitch-embed": "^3.0.1",
     "sass": "^1.49.7",
-    "start-server-and-test": "^1.15.2",
+    "start-server-and-test": "^1.15.4",
     "tailwindcss": "^3.1.7",
     "typescript": "4.5.5",
     "url-loader": "^4.1.1",