Add support for Ruby 3

[tiinapennala]

In ruby 3 keyword and positional arguments are separated and hash is treated as a single positional argument.
This change supports both ruby 2 and 3 with both hashes and keyword arguments.

In documentation: https://www.ruby-lang.org/en/news/2019/12/12/separation-of-positional-and-keyword-arguments-in-ruby-3-0/

this style is not recommended in new code, unless you are often passing a Hash as a positional argument, and are also using keyword arguments. Otherwise, use double splat