fix(deps): upgrade express

Upgrade the braintrust package to Express 5.2.1 to remove vulnerable transitive production dependencies from Express 4, including path-to-regexp 0.1.x and older qs versions.

Author: AbhiPrasad

.changeset/upgrade-express-security-deps.md

@@ -0,0 +1,5 @@
+---
+"braintrust": patch
+---
+
+fix(deps): Upgrade Express to remove vulnerable transitive dependencies

integrations/browser-js/package.json

@@ -25,7 +25,7 @@
   },
   "dependencies": {
     "als-browser": "^1.0.1",
-    "braintrust": ">=3.0.0-rc.29"
+    "braintrust": "workspace:^"
   },
   "devDependencies": {
     "@types/node": "^20.10.5",

js/package.json

@@ -209,7 +209,7 @@
     "dotenv": "^16.4.5",
     "esbuild": "0.28.0",
     "eventsource-parser": "^1.1.2",
-    "express": "^4.21.2",
+    "express": "^5.2.1",
     "graceful-fs": "^4.2.11",
     "http-errors": "^2.0.0",
     "minimatch": "^10.2.5",