[GHC] #15930: Add @since-annotations to the Foldable methods

[GHC]

#15930: Add @since-annotations to the Foldable methods
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        Reporter:  sjakobi           |                Owner:  (none)
            Type:  feature request   |               Status:  patch
        Priority:  normal            |            Milestone:  8.6.3
       Component:  Core Libraries    |              Version:  8.6.2
      Resolution:                    |             Keywords:  newcomers
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D5379
       Wiki Page:                    |
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Changes (by dminuoso):

 * status:  new => patch
 * differential:   => Phab:D5379


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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15930#comment:2>
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