Bump hardhat from 2.10.2 to 2.12.7

Bumps [hardhat](https://github.com/nomiclabs/hardhat) from 2.10.2 to 2.12.7.
- [Release notes](https://github.com/nomiclabs/hardhat/releases)
- [Commits](https://github.com/nomiclabs/hardhat/compare/hardhat@2.10.2...hardhat@2.12.7)

---
updated-dependencies:
- dependency-name: hardhat
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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