npm / arborist / #820

push

Never bundle when saving as peer/peerOptional

There's a bit of logic in npm/cli that sets the `saveBundle` option to
false based on the various `--save-xyz` flags.  It is easier and safer
to just never bundle if we're saving a peer dep, in the one place where
that decision is made.

PR-URL: https://github.com/npm/arborist/pull/255
Credit: @isaacs
Close: #255

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