fast_float 8.0.0

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Created by brew bump

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Created with brew bump-formula-pr.

release notes

## What's Changed
* Add version macros by @dalle in https://github.com/fastfloat/fast_float/pull/284
* Better compile time error messages for unsupported types by @dalle in https://github.com/fastfloat/fast_float/pull/283
* Fix clang warning unused function by @dalle in https://github.com/fastfloat/fast_float/pull/287
* Support char8_t on C++20 by @dalle in https://github.com/fastfloat/fast_float/pull/289
* update scripts by @dalle in https://github.com/fastfloat/fast_float/pull/290
* Add tests for all supported char types by @dalle in https://github.com/fastfloat/fast_float/pull/292
* adding actual benchmarks to the project by @lemire in https://github.com/fastfloat/fast_float/pull/293
* introduce equiv_uint_t helper by @dalle in https://github.com/fastfloat/fast_float/pull/294
* Silenced Visual Studio compiler warning by @jrade in https://github.com/fastfloat/fast_float/pull/298
* documenting benchmarks by @lemire in https://github.com/fastfloat/fast_float/pull/299
* 16-bit float support by @dalle in https://github.com/fastfloat/fast_float/pull/296
New Contributors

@jrade made their first contribution in Silenced Visual Studio compiler warning fastfloat/fast_float#298

Full Changelog: fastfloat/fast_float@v7.0.0...v8.0.0

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