enable #![no_std]

[jayakasadev]

allow users to use humantime in bare-metal environments

[djc]

Thanks for contributing! I think it would be nice to offer no_std support but I'd like to split this up in several parts. First off, I suggest you do a PR that enables clippy::std_instead_of_core and clippy::std_instead_of_alloc the crate root and fixes all of the resulting warnings.

Second, given that this crate now lives in the chronotope org, I'm ambivalent on using the time crate. Would you be open to using chrono's no_std support instead?

Third, I'd like to understand the MSRV impact given that CI failed.

Fourth, it's not obvious to me that this is worth a semver-incompatible API change. Do you think we could make this change additive instead?

[jayakasadev]

@djc does this align with your expectations for part 1 of the change?
#53

[djc]

Let's get #53 merged first?

[jayakasadev]

Going to close this since the work is being split up.