Bump engine.io version to match FEM.

Author: traviskoleva

package.json

@@ -8,7 +8,7 @@
     "chai": "^5.1.0",
     "chai-changes": "^1.3.4",
     "chai-spies": "^1.0.0",
-    "engine.io-client": "^6.3.0",
+    "engine.io-client": "~6.6.0",
     "mocha": "^10.2.0",
     "uglify-js": "^3.17.4"
   },
@@ -17,7 +17,7 @@
     "basic-auth": "2.0.1",
     "body-parser": "^1.18.3",
     "check-engines": "^1.5.0",
-    "engine.io": "^6.3.1",
+    "engine.io": "~6.6.0",
     "express": "^4.16.4",
     "express-rate-limit": "^7.0.1",
     "jsonwebtoken": "^9.0.0",