Calls a method inherited from the parent class of cls on receiver.
cls must be a Scala.js-defined JS class.
Given the Scala.js-defined JS class
class Foo extends Bar
JSSuperBrackerCall(ClassType(Foo), receiver, method, args)
which is printed as
has the following semantics:
If this happens to be located in an instance method of Foo, *and*
receiver happens to be This(), this is equivalent to the ES6