Misleading installation instructions

[kl0tl]

Is your change request related to a problem? Please describe.
The README suggests that this package can be installed with spago install argonaut but argonaut-generic is not a dependency of argonaut so this isn’t actually possible.

Describe the solution you'd like
We should either remove the instruction or add argonaut-generic to the dependencies of argonaut.

[thomashoneyman]

Oh, that’s a good point — we should remove the instruction.