@stackline/deepmerge Copyright (c) 2026 Alexandro Paixao Marques and contributors This package is an independent implementation. Its public behavior is designed to support migration from deepmerge version 4, a separate MIT-licensed project by James Halliday, Josh Duff, and other contributors: https://github.com/TehShrike/deepmerge The upstream package is used as a development-only behavioral reference in the differential compatibility tests. It is not included as a runtime dependency. The name "deepmerge" is used descriptively for API compatibility. This project is not affiliated with or endorsed by the upstream maintainers.