Version 0.11.0

• Refactoring (AND/OR/NOT-Queries, method signatures, public to private methods)
• Rename methods: query.translate_xy() to query.write(syntax=xy), query.print_query_xy() to query.to_string(syntax=xy)
• Integrate Query tree into node attribute
• Make dev dependencies optional
• Add tests on GitHub actions
• Extract constants
• Code skeleton for Parsers and Linters
• Documentation: Sphinx
• SearchFields instead of str
• Binder demo
• Implement Query.selects()
• Drop ABC inheritance
• Add is_term() and is_operator()