cgp-field pulls in std transitively via cgp-base-types #272

This crate is marked #![no_std]:

But one of its dependencies (cgp-base-types, version 0.8.0-alpha) does not support no_std and pulls in std transitively:

As a result, builds targeting bare-metal or other no_std-only targets fail to compile, even though the crate itself contains no direct std usage.