Version 0.1.5

Changelog:

- This library used to link to my `sss` library that was written in C.  From
  this version, the complete library is written only in Rust.
- The `have_libsodium` feature flag is deprecated.
- The minimum required rustc version is now 1.44.0.

Version 0.1.4

Changelog:

- Add a 'have_libsodium' feature, that disables the inclusion of the
  `randombytes` module.

Version 0.1.3

Version 0.1.2

Version 0.1.1

Changes since version 0.1.0:

- Remove an unintended side channel which allows a participating attacker with
  access to a accurate timing channel to iteratively guess shares during the
  execution of `combine_shares`.

Version 0.1.0