We now test extraneousness which means recursively walking `requiredBy`
which won't work if one of them is not an object.

This reverts commit 06c154f.

This caused problems because folks were using peer deps to indicate that the
target of the peer dep needed to be able to require the dependency and had
been relying on the fact that peer deps didn't change the shape of the tree
(as of npm@3).

The fix that will actually work for people is for a peer dep to insist on
never being installed deeper than the the thing it relies on.  At the moment
this is tricky because the thing the peer dep relies on may not yet have
been added to the tree, so we don't know where it is.

* feature: Added possibility to ls only linked packages

* test: added test case for ls --link

* docs: documented --link for npm-ls

PR-URL: npm/npm#17616
Credit: @richardsimko
Reviewed-By: @zkat

Removing modules when there are transitive symlinks requires that it be
deepest first, working our way out.

Running uninstall lifecycles needs to be shallowest first working our way
in.

Previously these were all wrapped up in `lib/unbuild` and we couldn't win.
This splits them apart. This wasn't previously an issue because we had
no facility for creating transitive dependencies as symlinks.

PR-URL: npm/npm#17733
Credit: @iarna
Reviewed-By: @zkat

* More languages
* Windows fixes
* More bugfixes
* New --node-arg opt
* prevent auto-fallback infinite loop when npx disappears
* npx npx npx npx npx npx npx npx works
* no longer bundles deps with libnpx so they can flatten
* update-notifier will no longer run for bundled version

Previously it was using the realpath (the path w/o any symlinks in it) which
proceeded to confusing `fs-vacuum` as that path wasn't necessarily in the
base path (our module).

(Partially)
Fixes: #17637

PR-URL: npm/npm#17748
Credit: @iarna
Reviewed-By: @zkat

PR-URL: npm/npm#17728
Credit: @sankethkatta
Reviewed-By: @zkat

PR-URL: npm/npm#17684
Credit: @sonicdoe
Reviewed-By: @zkat

PR-URL: npm/npm#17691
Credit: @timneedham
Reviewed-By: @zkat

* use semver to compare versions

A lexicografical comparison can give incorrect results. e.g.:
'v6.10.0' > 'v6.9.0' => false

* use valid minimum version

PR-URL: npm/npm#17706
Credit: @leo-shopify
Reviewed-By: @zkat

* Sequential promises instead of concurrent

* Fixed style errors

* Removed the promise constructor

PR-URL: npm/npm#17742
Credit: @markpeterfejes
Reviewed-By: @zkat

PR-URL: npm/npm#17776
Credit: @iarna
Reviewed-By: @zkat

…777)

PR-URL: npm/npm#17777
Credit: @iarna
Reviewed-By: @zkat

* Add zh_TW (Traditional Chinese) translation
* fix issue with finding bin prefixes in nested directory
* other i18n tweaks