v0.10.0

Important changes since last release:

• no_std support!
• The default enum format was changed. It now uses the externally tagged format recommended by serde.
  One can optionally serialize to the legacy array-based format.
  Both formats are accepted for deserialization.
• Deserialization is configurable.
  Opt-out of the packed format or only accept one enum serialization.
• Value variants were renamed and simplified.
• Keys of Value maps are now sorted in a canonical order.
• Some utility methods for serialization and deserialization were removed
  because they saw little use.
• 128-bit numbers can be used, but bear in mind that the values are
  still limited to 64-bit by the CBOR format.
• Better docs and README.
• Bug fixes.

I would like to thank @sfackler, @chrysn, @ogoodman, @kcking, @wildarch and @baloo for their contributions to this release!

If you have any questions or problems with the new release please open an issue.