Bump @babel/plugin-proposal-optional-chaining from 7.2.0 to 7.6.0 (#125)
Bump @babel/plugin-proposal-optional-chaining from 7.2.0 to 7.6.0 (#125)

Bumps [@babel/plugin-proposal-optional-chaining](https://github.com/babel/babel) from 7.2.0 to 7.6.0.
- [Release notes](https://github.com/babel/babel/releases)
- [Changelog](https://github.com/babel/babel/blob/master/CHANGELOG.md)
- [Commits](https://github.com/babel/babel/compare/v7.2.0...v7.6.0)

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