Add swift 6.1 CI (#634)

Author: adam-fowler

.github/workflows/ci.yml

@@ -43,6 +43,7 @@ jobs:
           - 'swift:5.9'
           - 'swift:5.10'
           - 'swift:6.0'
+          - 'swiftlang/swift:nightly-6.1-jammy'
     container:
       image: ${{ matrix.image }}
     steps:

Sources/SotoCore/AWSShapes/Base64Data.swift

@@ -24,7 +24,7 @@ public struct AWSBase64Data: Sendable, Codable, Equatable {
 
     /// construct `AWSBase64Data` from raw data
     public static func data(_ data: some Collection<UInt8>) -> Self {
-        .init(base64String: String(base64Encoding: data))
+        .init(base64String: String(_base64Encoding: data, options: []))
     }
 
     /// construct `AWSBase64Data` from base64 encoded data
@@ -51,6 +51,6 @@ public struct AWSBase64Data: Sendable, Codable, Equatable {
 
     /// return blob as Data
     public func decoded() -> [UInt8]? {
-        try? self.base64String.base64decoded()
+        try? self.base64String._base64Decoded()
     }
 }

Sources/SotoCore/Utils/base64.swift

@@ -71,11 +71,11 @@
 // MARK: - Extensions -
 
 extension String {
-    init(base64Encoding bytes: some Collection<UInt8>, options: Base64.EncodingOptions = []) {
+    init(_base64Encoding bytes: some Collection<UInt8>, options: Base64.EncodingOptions = []) {
         self = Base64.encodeString(bytes: bytes, options: options)
     }
 
-    func base64decoded(options: Base64.DecodingOptions = []) throws -> [UInt8] {
+    func _base64Decoded(options: Base64.DecodingOptions = []) throws -> [UInt8] {
         try Base64.decode(string: self, options: options)
     }
 }

Sources/SotoXML/Expat.swift

@@ -18,7 +18,11 @@
 //  Licensed under Apache License v2.0 http://www.apache.org/licenses/LICENSE-2.0.html
 //
 
+#if compiler(>=6.0)
+internal import CSotoExpat
+#else
 @_implementationOnly import CSotoExpat
+#endif
 
 #if canImport(Glibc)
 import Glibc