Add better explanation/code example of the automatic peerdep on node-fetch about fetch HOT 5 CLOSED

@Qix- I think we discussed about this somewhere else.
When we explicitly import node-fetch, it's a lot clear.
There's no need to mention anything about peerDependencies.

On the otherhand, we can simply make node-fetch a dependancy of @zeit/fetch and make an API similar to node-fetch.

from fetch.

Then I think the constructor should require it IMO. @rauchg thoughts?

from fetch.

FWIW it was nice to be able to use a specific version of node-fetch with this module to help identify whether a bug came from this module vs. node-fetch itself (because the beta version of node-fetch exhibited the same bug, so the issues was in @zeit/fetch-cached-dns, for example).

from fetch.

We should just drop the require('@zeit/fetch')() implicit syntax IMO.

from fetch.

Thank you for the report. We are archiving this project; you can read more details here: #83

from fetch.