deps: pin @codeceptjs/expect-helper to ^4.0.0-beta.3

Both `@codeceptjs/configure@^4.0.0-beta.2` and
`@codeceptjs/expect-helper@^4.0.0-beta.3` are now native ESM with
codeceptjs declared as an optional peer dep, matching CodeceptJS 4.x.
Caret ranges pick up future 4.x betas, RCs, and the eventual stable
release without further package.json edits.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: DavertMik

package.json

@@ -138,7 +138,7 @@
   },
   "devDependencies": {
     "@apollo/server": "^5",
-    "@codeceptjs/expect-helper": "^1.0.2",
+    "@codeceptjs/expect-helper": "^4.0.0-beta.3",
     "@codeceptjs/mock-request": "0.3.1",
     "@eslint/eslintrc": "3.3.3",
     "@eslint/js": "9.39.2",