Mark SE-0239 as accepted.

Author: tkremenek

proposals/0239-codable-range.md

@@ -4,7 +4,9 @@
 * Authors: [Dale Buckley](https://github.com/dlbuckley), [Ben Cohen](https://github.com/airspeedswift), [Maxim Moiseev](https://github.com/moiseev)
 * Review Manager: [Ted Kremenek](https://github.com/tkremenek)
 * Implementation: [apple/swift#19532](https://github.com/apple/swift/pull/19532)
-* Status: **Active review (December 13...20, 2018)**
+* Status: **Accepted**
+* Review: [Discussion thread](https://forums.swift.org/t/se-0239-add-codable-conformance-to-range-types/18794/51)
+
 
 ## Introduction