Update image_optim dependency 0.12.0 -> 0.13.0
Update image_optim dependency 0.12.0 -> 0.13.0

Changes:

  https://github.com/toy/image_optim/compare/70ec2ed18aebc1cc07038e0b0c7494f2b23e4fec...8fe5473e2a5aa23db9121dd19b3a464c8323a443

Change-Id: Ifc992739207715ed4ca136bf2097551f0bc83b6b
Reviewed-on: http://gerrit.causes.com/36959
Tested-by: jenkins <d95b56ce41a2e1ac4cecdd398defd7414407cc08@causes.com>
Reviewed-by: Shane da Silva <6f6e68d1df92f30cb4b3ce35260ddf94a402f33d@causes.com>

gnagel/overcommit,blech75/overcommit,TheSooth/overcommit,gnagel/overcommit,TheSooth/overcommit,oxocode/overcommit,blech75/overcommit,oxocode/overcommit