Upgrade to Scalaz 7.10 and all that entains

Started upgrading Mundane and hit this. There are two changes I made that I think are _wrong_ and would appreciate feedback on - I'll leave comments on the specific lines.

/cc @etorreborre @markhibberd 
https://github.com/scalaz/scalaz/pull/725 seems to hold the solution.

    Suspend(x) = gosub(return_, x)