[ruby/time] Update required ruby version
Regexp#match? which is introduced at ruby 2.4 is used since https://github.com/ruby/time/pull/1852.
Regexp#match?
https://github.com/ruby/time/commit/b0a965dcaa
Added by nobu (Nobuyoshi Nakada) over 2 years ago
[ruby/time] Update required ruby version
Regexp#match?which is introduced at ruby 2.4 is used since https://github.com/ruby/time/pull/1852.https://github.com/ruby/time/commit/b0a965dcaa