Restrict minimal Ruby version to 2.4.0 #212
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Thank you for your great work, @kpumuk !
In version 2.12 of the gem the
transform_values
method, called on a hash, has been introduced - https://github.com/kpumuk/meta-tags/pull/201/files#diff-a95b6e1bb981e380eaa6ee3996b217afR158This method has appeared in Ruby 2.4.0, thus this PR.