build(deps): bump lodash from 4.17.23 to 4.18.1 in /ethtest/testchain

Bumps [lodash](https://github.com/lodash/lodash) from 4.17.23 to 4.18.1.
- [Release notes](https://github.com/lodash/lodash/releases)
- [Commits](lodash/lodash@4.17.23...4.18.1)

---
updated-dependencies:
- dependency-name: lodash
  dependency-version: 4.18.1
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

ethtest/testchain/package.json

@@ -21,7 +21,7 @@
   "pnpm": {
     "overrides": {
       "axios": ">=1.13.5",
-      "lodash": ">=4.17.23",
+      "lodash": ">=4.18.1",
       "undici": ">=6.23.0"
     }
   },