Add tests for IEEE 754-2019 compliance

## Checklist

> Please ensure the following tasks are completed before filing a bug report.

- [x] Read and understood the [Code of Conduct][code-of-conduct].
- [x] Searched for existing issues and pull requests.

## Description

> Description of the issue.

To ensure conformance of `@stdlib/math/base/special/*` functions with [IEEE 754-2019](http://www.dsc.ufcg.edu.br/~cnum/modulos/Modulo2/IEEE754_2008.pdf), we should explicitly include compliance tests in the various test suites of the mathematical functions (e.g., `pow`, `exp`, etc) present in the standard. The IEEE 754 [standard](http://www.dsc.ufcg.edu.br/~cnum/modulos/Modulo2/IEEE754_2008.pdf) explicitly states behavior for various edge cases for each mathematical function. By including these tests, we can ensure that the underlying implementations, should they change, always remain IEEE 754 compliant.

## Related Issues

> Does this issue have any related issues?

None.

## Questions

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No.

## Other

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No.

[code-of-conduct]: https://github.com/stdlib-js/stdlib/blob/develop/CODE_OF_CONDUCT.md

Commencez par lire les suites de tests des fonctions sous @stdlib/math/base/special/*, en prenant pow et exp comme exemples, et consultez la norme IEEE 754-2019 liée pour connaître le comportement requis dans les cas limites. Ajoutez des tests explicites de conformité pour les fonctions mathématiques concernées et exécutez leurs suites de tests afin de confirmer que les implémentations restent conformes.

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