Bump num2words from 0.5.6 to 0.5.7
Bump num2words from 0.5.6 to 0.5.7

Bumps [num2words](https://github.com/savoirfairelinux/num2words) from 0.5.6 to 0.5.7.
- [Release notes](https://github.com/savoirfairelinux/num2words/releases)
- [Changelog](https://github.com/savoirfairelinux/num2words/blob/master/CHANGES.rst)
- [Commits](https://github.com/savoirfairelinux/num2words/compare/0.5.6...0.5.7)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
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