apply wavy edges treatment to the lineup component

[thescientist13]

Summary

From the designs, the Lineup component should have more "wavy" edges around it.

Currently the edges are flat.

Details

Not sure the best way to do it, but if it could be done with CSS somehow that would be great. Otherwise, if we need any custom assets from the designer we can reach out for those.

Hopefully we can do it in a generic way (e.g. CSS) so that it isn't specific to the image and also works responsively, where having to slice out images could be tricky.