Super in async functions brakes when not transpiled fully
Super in async functions brakes when not transpiled fully

Super in async functions only work when also classes and everything are
transpiled to most basic ES5- code. Otherwise babel generates code like:

    class A {
      def m() { // async function
        var _this = this;
        return _asyncToGenerator(fucntion *() {
          return super.m() // Kaputt
        }
      }
    }

LivelyKernel/lively4-core,LivelyKernel/lively4-core