[gardening] Correct the Swift version for which SE-0195 and SE-0196 are implemented (swiftlang#795)

* SE-0195 is implemented in Swift 4.2

* SE-0196 is implemented in Swift 4.2

Author: xwu

proposals/0195-dynamic-member-lookup.md

@@ -5,7 +5,7 @@
 * Review Manager: [Ted Kremenek](https://github.com/tkremenek)
 * Implementation: [apple/swift#14546](https://github.com/apple/swift/pull/14546)
 * [Previous Revision #1](https://github.com/apple/swift-evolution/commit/59c7455170c231f3df9ab0ba923262e126afaa06#diff-b3460d13f154c3d6b1d8396e4159a1d2)
-* Status: **Implemented (Swift 5)**
+* Status: **Implemented (Swift 4.2)**
 * Decision Notes: [Review extended](https://forums.swift.org/t/se-0195-introduce-user-defined-dynamic-member-lookup-types/8658/126), [Rationale](https://forums.swift.org/t/se-0195-introduce-user-defined-dynamic-member-lookup-types/8658/160)
 
 

proposals/0196-diagnostic-directives.md

@@ -5,7 +5,7 @@
 * Review Manager: [Ted Kremenek](https://github.com/tkremenek)
 * Implementation: [apple/swift#14048](https://github.com/apple/swift/pull/14048)
 * Previous Revision: [1](https://github.com/apple/swift-evolution/blob/ab0c22a2340be9bfcb82e6f237752b4d959a93b7/proposals/0196-diagnostic-directives.md)
-* Status: **Implemented (Swift 5)**
+* Status: **Implemented (Swift 4.2)**
 
 ## Introduction