[ANN] interval-patterns-0.8.2

Very nice, especially symmetricDifference. How would you do a convex hull union? Like unionHull (2 :||: 4) (5 :<>: 7) = 2 :|>: 7? I do this a lot using numhask-space: Numerical spaces. but I cop out with a convex hull union and have often thought of extending towards a cleaner approach like this.