Fix kwargs usage for Ruby 2.7

[aubinlrx]

This PR intend to fix a deprecation warning on Ruby 2.7. The method cache_fragment_name take keyword arguments. Since Ruby 2.7 a deprecation warning is diplayed when calling this method.

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

[kaspth]

Thanks!

[bishwahang]

Hello @kaspth, when will this fix be released as new version of gem?
Thank you.