www: Use local link:
dependencies
#4849
Merged
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This PR fixes the issue that #4813 tried to address, this time in a more maintainable and convenient way. Turns out that yarn has an undocumented support for link: dependency type which is effectively a symlink. This is exactly what we need to prevent stale dependencies.
The feature this PR relies on is not accidentally exposed behavior that could go away anytime soon as there's been an accepted RFC to add it: yarnpkg/rfcs#34.
I've opened yarnpkg/website#969 to document this behavior.