Scru128

Added

- `generate_no_rewind()` and `generate_core_no_rewind()` to `Scru128Generator`
(experimental)

Maintenance

- Improved documentation about generator method flavors
- Updated dev dependencies

Added

- Iterable and Iterator implementations to `Scru128Generator` to make it work as
infinite iterator

Maintenance

- Updated dev dependencies

Added

- `new()` and `new_string()`

Deprecated

- `scru128()` and `scru128_string()` to promote `scru128.new()` syntax over
`from scru128 import scru128`

Maintenance

- Updated dev dependencies

Fixed

- `generate_core()` to update `counter_hi` when `timestamp` passed < 1000

Maintenance

- Updated dev dependencies

Fixed

- `generate_core()` to reject zero as `timestamp` value

Added

- `generate_core()` and `last_status` to Scru128Generator