Bump ecdsa from 0.15 to 0.16.0 (from PR #5542)
Bump ecdsa from 0.15 to 0.16.0 (from PR #5542)

Bumps [ecdsa](https://github.com/warner/python-ecdsa) from 0.15 to 0.16.0.
- [Release notes](https://github.com/warner/python-ecdsa/releases)
- [Changelog](https://github.com/warner/python-ecdsa/blob/master/NEWS)
- [Commits](https://github.com/warner/python-ecdsa/compare/python-ecdsa-0.15...python-ecdsa-0.16.0)

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

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