* fix: peers are resolved similarly during named and general install
There is no need to always run a general installation for
creating a predictable `node_modules` structure. If peers are
resolved from top dependencies, the peers are not linked to
the dependent package. The dependent package can see such peers
w/o additional manipulations
Ref #724
* fix: don't print warning when peer is resolved from top dep
* test: verify the peer warning are reported correctly