Bump hardhat-gas-reporter from 1.0.10 to 2.1.0 in /bridge

Bumps [hardhat-gas-reporter](https://github.com/cgewecke/hardhat-gas-reporter) from 1.0.10 to 2.1.0.
- [Release notes](https://github.com/cgewecke/hardhat-gas-reporter/releases)
- [Changelog](https://github.com/cgewecke/hardhat-gas-reporter/blob/master/CHANGELOG.md)
- [Commits](https://github.com/cgewecke/hardhat-gas-reporter/commits/v2.1.0)

---
updated-dependencies:
- dependency-name: hardhat-gas-reporter
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]