Remove Array/String type check in new pseudolocalize_node method

re: #82 (comment)

Author: sjahu

lib/pseudolocalization.rb

@@ -61,7 +61,7 @@ def pseudolocalize_node(node, scope = [])
           node.each_with_object({}) do |(key, value), memo|
             memo[key] = pseudolocalize_node(value, scope + [key])
           end
-        elsif (node.is_a?(String) || node.is_a?(Array)) && !key_ignored?(scope.join('.'))
+        elsif !key_ignored?(scope.join('.'))
           ::Pseudolocalization::I18n::Pseudolocalizer.pseudolocalize(node)
         else
           node