npm / arborist / #439

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fix: missing bins info in package-lock

When migrating from package-lock v1 -> v2 in a project that currently
has an actual tree + a package-lock file the reify process fails to
properly update the package-lock with the bins info.

This fixes it by setting build-ideal-tree to always inflate old
lockfiles even if `complete: true` isn't set.

Fixes: https://github.com/npm/cli/issues/1957

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