Solution for graphql_derive build errors

[namibj]

I had these issues about half a year ago, and finally decided to just massage the Cargo.toml's by hand until it worked.

I hereby urge you to commit Cargo.lock, even for libraries like this one, because cargo only creates Cargo.lock if there's something lock-worthy like the examples here.

Please don't make me spend the better part of a day for the next example/experiment.

Here is what I came up with, btw.: https://gist.github.com/namibj/beb55efb68b6663cb06bbcacece61e3b
It's not pretty, due to the path dependencies, but at compiles.

Edit: it still panics at runtime, but at least it works to some extend.