reexport ImageSegmentation

[johnnychen94]

This requires a new ImageSegmentation release JuliaImages/ImageSegmentation.jl#85

closes #989
closes JuliaImages/ImageSegmentation.jl#78

[codecov]

Codecov Report

Merging #990 (660084d) into jc/houseclean (972d810) will not change coverage.
The diff coverage is n/a.

@@              Coverage Diff               @@
##           jc/houseclean     #990   +/-   ##
==============================================
  Coverage          87.72%   87.72%           
==============================================
  Files                  8        8           
  Lines                823      823           
==============================================
  Hits                 722      722           
  Misses               101      101           

Impacted Files	Coverage Δ
src/Images.jl	100.00% <ø> (ø)

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