Use Swift 5.10 toolchain

Author: mokagio

.buildkite/pipeline.yml

@@ -3,7 +3,7 @@ common_params:
   plugins: &common_plugins
     - automattic/a8c-ci-toolkit#3.1.0
   env: &common_env
-    IMAGE_ID: xcode-15.0.1
+    IMAGE_ID: xcode-15.3-v3
 
 # This is the default pipeline – it will build and test the pod
 steps:

Package.swift

@@ -1,4 +1,4 @@
-// swift-tools-version:5.5
+// swift-tools-version:5.10
 
 import Foundation
 import PackageDescription
@@ -73,7 +73,7 @@ func swiftLintPlugin() -> PackageDescription.Package.Dependency {
         return .package(url: url, from: "0.54.0")
     }
 
-    return .package(url: url, .exactItem(version))
+    return .package(url: url, .exact(version))
 }
 
 func loadSwiftLintVersion() -> Version? {