New release for #![no_std] support

[est31]

It would be cool to get a new release of gimli so that issue #138 is fixed on the latest release as well. This is needed so that addr2line can offer #![no_std] support itself, which is needed so that addr2line as well as gimli can be used inside the libstd library (gimli-rs/addr2line#89, rust-lang/rust#46439).

It is more than 6 months since the last release of gimli. I'd say it's reasonable to have a new release again.

Thanks!

[fitzgen]

@philipc was there anything else with regards to EndianReader that you wanted to land before we push out a new release? Or anything else in general?

Otherwise, I'm happy to push a new release.

[philipc]

No, I think it's good for a release.