This release is effectively a complete rewrite of the `kem` crate. Any
similarities between trait names in this release and previous releases
is coincidental. The log below highlights some of the new parts of the
API but will provide an incomplete picture of changes.

## Added
- `Encapsulate` and `Decapsulate` traits (#1509)
- `getrandom` feature (#2140)
- Re-exports from `crypto-common` (#2222)
  - re-exports `crypto-common` itself as `common`
  - re-exports `KeyInit`, which is useful for seeds
  - re-exports `Key` as the type for representing serialized encapsulation
    and decapsulation keys
  - re-exports `InvalidKey` as the error when `TryKeyInit` fails
- `TryDecapsulate` trait (#2220, #2235)
- `Kem` trait for the whole algorithm type family (#2243)
- `FromSeed` trait and `Seed` type alias (#2284)

## Changed
- `Decapsulator` trait replaced with new implementation (#2282)

## Removed
- Previous implementation (#1509)