Update Debian version to 0.4.3.
Export Ctx from Haste.Graphics.Canvas.
createCanvas should return Canvas, not Maybe Canvas.
Use JSString to get/set props in Canvas, never String.
Clean up Haste.Graphics.Canvas warnings.
Update websockets version constraint.
Require GHC 7.6+ since there's been no testing with 7.4 for ages.
Remove GHC 7.4 conditionals.
Fix missing cases in Data.JSTarget.Traversal.finalStm.