Bumps [prettier-plugin-solidity](https://github.com/prettier-solidity/prettier-plugin-solidity) from 1.0.0-beta.18 to 1.2.0.
- [Release notes](https://github.com/prettier-solidity/prettier-plugin-solidity/releases)
- [Commits](https://github.com/prettier-solidity/prettier-plugin-solidity/compare/v1.0.0-beta.18...v1.2.0)

---
updated-dependencies:
- dependency-name: prettier-plugin-solidity
  dependency-type: direct:development
  update-type: version-update:semver-minor
...
Signed-off-by: dependabot[bot] <support@github.com>