2.1.0

[postmodern]

• Added Ronin::Code::SQL::Mixin.
• Added Ronin::Code::SQLI as an alias for Ronin::Code::SQL::Injection.
• Added support for the syntax: and comment: keyword arguments to
  Ronin::Code::SQL::Statement#to_sql and Ronin::Code::SQL::Injection#to_sql.
• Added Ronin::Code::SQL::Clauses#order_by.
• Added Ronin::Code::SQL::Emitter#emit_comment.

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This discussion was created from the release 2.1.0.