Use a python `slice` to represent a range to be fizzbuzzed

[MusicalNinjaDad]

Use new functionality from rust v3.0.0 plus build with --release optimisations giving up to 75x performance vs native python!

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Additional details and impacted files

| [Flag](https://app.codecov.io/gh/MusicalNinjaDad/FizzBuzz/pull/46/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=None) | Coverage Δ | | |---|---|---| | [fizzbuzz](https://app.codecov.io/gh/MusicalNinjaDad/FizzBuzz/pull/46/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=None) | `93.84% <ø> (+1.68%)` | :arrow_up: | | [fizzbuzzo3](https://app.codecov.io/gh/MusicalNinjaDad/FizzBuzz/pull/46/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=None) | `87.50% <100.00%> (+8.33%)` | :arrow_up: | | [python](https://app.codecov.io/gh/MusicalNinjaDad/FizzBuzz/pull/46/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=None) | `100.00% <ø> (ø)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=None#carryforward-flags-in-the-pull-request-comment) to find out more.

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