### Added
- Additional methods for `CtOption` (#1274):
  - `some`
  - `none`
  - `into_option_copied`
  - `filter_by`
  - `as_inner_unchecked`
  - `to_inner_unchecked`
- `Default` impl for `CtOption` (#1274)
- `map!` and `unwrap_or!` macros (#1274)
- `u128` methods for `Choice` (#1277):
  - `from_u128_le`
  - `from_u128_lsb`
  - `select_u128`