chore(node-resolve): remove use of deepmerge dependency due to npm audit noise - #2036

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: clowdhaus/actions/pr-title@v0.1.0. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/