Function cancel

test/lifecycle.js:550–554

(ms)

          });
        },
        cancel = function(ms) {
          return new Promise(function(resolve, reject) {
            setTimeout(function() { reject('rejected'); }, ms);
          });
        },
        fsm = new StateMachine({
          transitions: [
            { name: 'step', from: 'none', to: 'complete' }