With the introduction of `BinaryInteger` in Swift 3.2, ShiftOperations is no longer needed. Currently it's only conditionally included in SPM for Swift >= 3.2 in [Package.swift](https://github.com/nvzqz/RandomKit/blob/1dc13f2f9fe0770576243b5899dfd88525f4457c/Package.swift#L47-L49). It should also be conditionally included in CocoaPods and Carthage.