Release META.yml 1.4

[Michael G Schwern]

chorny has patched MakeMaker to add build and configure_requires support, but 
realized that the 1.3 META.yml spec doesn't have configure_requires.  That's 
only in the bleading version.  I don't want to release a MakeMaker that 
produces blead META.ymls.  Can META.yml 1.4 please be released?

--
<Schwern> What we learned was if you get confused, grab someone and swing
          them around a few times
        -- Life's lessons from square dancing