Merge pull request swiftlang#30699 from theblixguy/chore/update-changelog

Update CHANGELOG

Author: CodaFi

CHANGELOG.md

@@ -6,7 +6,8 @@ CHANGELOG
 
 | Version                | Released   | Toolchain   |
 | :--------------------- | :--------- | :---------- |
-| [Swift 5.2](#swift-52) |            |             |
+| [Swift 5.3](#swift-53) |            |             |
+| [Swift 5.2](#swift-52) | 2020-03-24 | Xcode 11.4  |
 | [Swift 5.1](#swift-51) | 2019-09-20 | Xcode 11.0  |
 | [Swift 5.0](#swift-50) | 2019-03-25 | Xcode 10.2  |
 | [Swift 4.2](#swift-42) | 2018-09-17 | Xcode 10.0  |
@@ -23,9 +24,25 @@ CHANGELOG
 
 </details>
 
-Swift Next
+Swift 5.3
 ----------
 
+* [SE-0280][]:
+  
+  Enum cases can now satisfy static protocol requirements. A static get-only property of type `Self` can be witnessed by an enum case with no associated values and a static function with arguments and returning `Self` can be witnessed by an enum case with associated values.
+  
+  ```swift
+  protocol P {
+    static var foo: Self { get }
+    static func bar(value: Int) -> Self
+  }
+  
+  enum E: P {
+    case foo // matches 'static var foo'
+    case bar(value: Int) // matches 'static func bar(value:)'
+  }
+  ```
+
 * [SE-0267][]:
 
   Non-generic members that support a generic parameter list, including nested type declarations, are now allowed to carry a contextual `where` clause against outer generic parameters. Previously, such declarations could only be expressed by placing the member inside a dedicated constrained extension.
@@ -97,9 +114,13 @@ Swift Next
   closure's capture list in addition to the existing 'use `self.` explicitly'
   fix-it.
 
+**Add new entries to the top of this section, not here!**
+
 Swift 5.2
 ---------
 
+### 2020-03-24 (Xcode 11.4)
+
 * [SR-11841][]:
 
   When chaining calls to `filter(_:)` on a lazy sequence or collection, the
@@ -292,8 +313,6 @@ Swift 5.2
   print(s[0])
   ```
 
-**Add new entries to the top of this section, not here!**
-
 Swift 5.1
 ---------
 
@@ -7951,6 +7970,7 @@ Swift 1.0
 [SE-0266]: <https://github.com/apple/swift-evolution/blob/master/proposals/0266-synthesized-comparable-for-enumerations.md>
 [SE-0267]: <https://github.com/apple/swift-evolution/blob/master/proposals/0267-where-on-contextually-generic.md>
 [SE-0269]: <https://github.com/apple/swift-evolution/blob/master/proposals/0269-implicit-self-explicit-capture.md>
+[SE-0280]: <https://github.com/apple/swift-evolution/blob/master/proposals/0280-enum-cases-as-protocol-witnesses.md>
 
 [SR-75]: <https://bugs.swift.org/browse/SR-75>
 [SR-106]: <https://bugs.swift.org/browse/SR-106>