[SE-0242] Update status to implemented (Swift 5.1)

<swiftlang/swift#23752>

Author: benrimmington

proposals/0242-default-values-memberwise.md

@@ -3,7 +3,7 @@
 * Proposal: [SE-0242](0242-default-values-memberwise.md)
 * Author: [Alejandro Alonso](https://github.com/Azoy)
 * Review Manager: [Ted Kremenek](https://github.com/tkremenek)
-* Status: **Accepted**
+* Status: **Implemented (Swift 5.1)**
 * Decision Notes: [Rationale](https://forums.swift.org/t/se-0242-synthesize-default-values-for-the-memberwise-initializer/20618/98)
 * Implementation: [apple/swift#19743](https://github.com/apple/swift/pull/19743)
 
@@ -129,4 +129,4 @@ As the memberwise initializer is only synthesized as an internal initializer, th
 
 ## Alternatives considered
 
-We could simply not do this and save this proposal for a solution much larger in regards to fixing more problems the memberwise initializer has. The downside is that we put off obvious changes like this for much longer because of wanting to solve a bigger problem. I agree we should solve the bigger problems, but by solving problems like this it aids in the solution of the larger problem.
+We could simply not do this and save this proposal for a solution much larger in regards to fixing more problems the memberwise initializer has. The downside is that we put off obvious changes like this for much longer because of wanting to solve a bigger problem. I agree we should solve the bigger problems, but by solving problems like this it aids in the solution of the larger problem.