Bump version to 0.6.2

Bump version

Simplify generated client code

Client stub now has single `with_client` operation,
and remaining shortcuts are implemented in `ClientStubExt` trait.

++ver

Bump version to 0.4.0

Bump version to 0.3.1

Bump version to 0.3.0

Update version to fix broken deps in 0.2.0

Bug fixed in httpbis