Reduce dependencies

[thomaseizinger]

Hi from rust-libp2p!

Just a heads-up that you could reduce your dependency tree by switching from libp2p to libp2p-core. Not only is that more lightweight, it might also reduce the number of breaking changes you have to go through.

We are working on making it easier to maintain external transports as well, so eventually you will be able to depend on a libp2p-transport crate that is just a thin interface.

[vincev]

Hi @thomaseizinger thank you for the heads-up, this looks nice I am going to make the switch.