Use a more idiomatic name so that it can be used as `client.New()`.
We should look if we want `New()` to have different / updated defaults
i.e., enable `WithEnv` as default, and have an opt-out and have API-
version negotiation enabled by default (with an opt-out option).
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>