The latest Pallas 0.31.0 requires unstable Nightly Rust

[michalrus]

The minicbor dependency has been updated from 0.20.0 to 0.25.1. And this new version requires unstable Nightly Rust for their use of core::error::Error.

I really don’t know if we should switch to an unstable compiler. 👀 /cc @mmahut

In the future, this is probably an issue for minicbor.

Would you please consider switching back to a stable-compatible version of minicbor for now? 🙏

Failure with stable Rust

   Compiling minicbor v0.25.1

error[E0658]: use of unstable library feature 'error_in_core'
   --> /home/mw/.cargo/registry/src/index.crates.io-6f17d22bba15001f/minicbor-0.25.1/src/data.rs:295:6
    |
295 | impl core::error::Error for UnknownTag {}
    |      ^^^^^^^^^^^^^^^^^^
    |
    = note: see issue #103765 <https://github.com/rust-lang/rust/issues/103765> for more information

[…]

For more information about this error, try `rustc --explain E0658`.
error: could not compile `minicbor` (lib) due to 13 previous errors