[macros] updated Cargo.toml for publishing
[macros] updated Cargo.toml for publishing

davll/gfx,ColinKinloch/gfx,gfx-rs/gfx-rs,tanderegg/gfx,ColinKinloch/gfx,JohnColanduoni/gfx,JohnColanduoni/gfx,tanderegg/gfx