Handle binary char set introducer

[G1gg1L3s]

This small PR adds support of mysql _binary charset introducer, which is used at least by java frontend. I would like to add other charsets, but they are not supported by the parser yet. So, if there is no need, I wouldn't do that.

Checklist

• [x] Change is covered by automated tests
• [x] The coding guidelines are followed
• [x] Public API has proper documentation in the Acra documentation site or has PR on documentation repository with new changes
• [x] ~CHANGELOG.md is updated (in case of notable or breaking changes)~
• [x] CHANGELOG_DEV.md is updated
• [x] ~Benchmark results are attached (if applicable)~
• [x] ~Example projects and code samples are up-to-date (in case of API changes)~