[Proposal] add be function to BeEqual interface

[sergeibukharov]

In order to maintain fluent DSL, I suggest adding be function to BeEqual interface.

true.should() be true
"Hello".should() be "Hello"

interface BeEqual<T, R : BeEqual<T, R>> {

infix fun be(expected: T): R = beEqual()

}

As a counterpart we may add notBe

"Hello".should() notBe "World"

[torczuk]

Do you suggest be to be an alias for beEqual or rename beEqual to be?