Log Message:
Update ruby-mechanize to 2.7.4.

=== 2.7.4

* New Features
  * Accept array-like and hash-like values as query/parameter value.
    A new utility method Mechanize::Util.each_parameter is added, and \ 
Mechanize::Util.build_query_string is enhanced
    for this feature.
  * Allow passing a `Form::FileUpload` instance to `#post`. #350 by Sam
    Rawlins.
  * Capture link when scheme is unsupported. #362 by Jon Rowe.
  * Pre-defined User-Agent stings are updated to those of more recent versions, \ 
and new aliases for IE 10/11 and Edge are added.
  * Support for mime-types 1.x is restored while keeping compatible with \ 
mime-types 2.x and adding support for 3.0.
  * Mechanize::Page now responds to #xpath, #css, #at_xpath, #at_css, and #%.
  * element(s)_with methods now accept :xpath and :css options for doing xpath/css
    selector searching.
  * Pass URI information to Nokogiri where applicable. #405 @lulalala

* Bug fix
  * Don't raise an exception if a connection has set a {read,open}_timeout and
    a `file://` request is made. (#397)
  * Fix whitespace bug in WWW-Authenticate. #451, #450, by Rasmus Bergholdt
  * Don't allow redirect from a non-file URL to a file URL for security reasons. \ 
(#455)