Log Message:
Update to safe-0.3.18

0.3.18, released 2019-12-04
    #27, deprecate maximumDef and friends, fold*1Def
    #27, add maximumBounded and friends
    Stop supporting GHC 7.4 to 7.8
0.3.17, released 2018-03-09
    Improve the display of errors, less internal callstack
    Add a few missing Partial constraints
0.3.16, released 2018-01-06
    #22, add Safe index
0.3.15, released 2017-06-18
    Support QuickCheck 2.10
0.3.14, released 2017-02-15
    #20, fix for GHC 7.10.1
0.3.13, released 2017-02-09
    #20, require GHC 7.4 or above
0.3.12, released 2017-02-05
    #19, add Safe.Partial exposing a Partial typeclass
    #19, add support for GHC call stacks
0.3.11, released 2017-01-22
    #16, add Safe succ and pred
    #16, add readEitherSafe for better errors than readEither
    #14, add Safe zip3Exact
0.3.10, released 2016-11-08
    #15, add Safe cycle
0.3.9, released 2015-05-09
    #9, add Safe toEnum
0.3.8, released 2014-08-10
    #8, remove unnecessary Ord constraints from Foldable functions