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npm has added support for packages to declare their directory location within a subdirectory. This aligns perfectly to our repository structuring and, as such, we should seek to include these values for each of our packages.

More information:

• https://github.com/npm/rfcs/blob/latest/implemented/0010-monorepo-subdirectory-declaration.md
• https://github.com/npm/cli/releases/tag/v6.8.0