[SE-0104 Revision 4] Implemented (Swift 4)

* <swiftlang/swift#11044>
* <swiftlang/swift#11203>

Author: benrimmington

proposals/0104-improved-integers.md

@@ -3,7 +3,7 @@
 * Proposal: [SE-0104](0104-improved-integers.md)
 * Authors: [Dave Abrahams](https://github.com/dabrahams), [Maxim Moiseev](https://github.com/moiseev)
 * Review Manager: [Ben Cohen](https://github.com/airspeedswift)
-* Status: **Active review (July 20...24)**
+* Status: **Implemented (Swift 4)**
 * Bug: [SR-3196](https://bugs.swift.org/browse/SR-3196)
 * Previous Revisions: 
   [1](https://github.com/apple/swift-evolution/blob/0440700fc555a6c72abb4af807c8b79fb1bec592/proposals/0104-improved-integers.md),