Bump middleman-syntax from 3.0.0 to 3.2.0
Bump middleman-syntax from 3.0.0 to 3.2.0

Bumps [middleman-syntax](https://github.com/middleman/middleman-syntax) from 3.0.0 to 3.2.0.
- [Release notes](https://github.com/middleman/middleman-syntax/releases)
- [Changelog](https://github.com/middleman/middleman-syntax/blob/master/CHANGELOG.md)
- [Commits](https://github.com/middleman/middleman-syntax/commits)

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