Bump CI simulator OS versions

The current ones don't seem to be available any more.

Author: lawrence-forooghian

.github/workflows/check.yaml

@@ -20,10 +20,10 @@ jobs:
         with:
           submodules: true
 
-      # This step can be removed once the runners' default version of Xcode is 16.3 or above
+      # This step can be removed once the runners' default version of Xcode is 16.4 or above
       - uses: maxim-lobanov/setup-xcode@v1
         with:
-          xcode-version: 16.3
+          xcode-version: 16.4
 
       # We use caching for Mint because at the time of writing SwiftLint took about 5 minutes to build in CI, which is unacceptably slow.
       # https://github.com/actions/cache/blob/40c3b67b2955d93d83b27ed164edd0756bc24049/examples.md#swift---mint
@@ -49,10 +49,10 @@ jobs:
   #        with:
   #          submodules: true
   #
-  #      # This step can be removed once the runners' default version of Xcode is 16.3 or above
+  #      # This step can be removed once the runners' default version of Xcode is 16.4 or above
   #      - uses: maxim-lobanov/setup-xcode@v1
   #        with:
-  #          xcode-version: 16.3
+  #          xcode-version: 16.4
   #
   #      - name: Spec coverage
   #        run: swift run BuildTool spec-coverage --spec-commit-sha 2f88b1b
@@ -68,10 +68,10 @@ jobs:
         with:
           submodules: true
 
-      # This step can be removed once the runners' default version of Xcode is 16.3 or above
+      # This step can be removed once the runners' default version of Xcode is 16.4 or above
       - uses: maxim-lobanov/setup-xcode@v1
         with:
-          xcode-version: 16.3
+          xcode-version: 16.4
 
       - id: generation-step
         run: swift run BuildTool generate-matrices >> $GITHUB_OUTPUT
@@ -149,10 +149,10 @@ jobs:
         with:
           submodules: true
 
-      # This step can be removed once the runners' default version of Xcode is 16.3 or above
+      # This step can be removed once the runners' default version of Xcode is 16.4 or above
       - uses: maxim-lobanov/setup-xcode@v1
         with:
-          xcode-version: 16.3
+          xcode-version: 16.4
 
       - run: swift run BuildTool generate-code-coverage --result-bundle-path CodeCoverage.xcresult
 
@@ -226,10 +226,10 @@ jobs:
         with:
           submodules: true
 
-      # This step can be removed once the runners' default version of Xcode is 16.3 or above
+      # This step can be removed once the runners' default version of Xcode is 16.4 or above
       - uses: maxim-lobanov/setup-xcode@v1
         with:
-          xcode-version: 16.3
+          xcode-version: 16.4
 
       # Dry run upload-action to get base-path url
       - name: Dry-Run Upload (to get url)

Sources/BuildTool/BuildTool.swift

@@ -148,7 +148,7 @@ struct GenerateMatrices: ParsableCommand {
     )
 
     mutating func run() throws {
-        let tooling = ["16.3"].map { xcodeVersion in
+        let tooling = ["16.4"].map { xcodeVersion in
             [
                 "xcodeVersion": xcodeVersion,
             ]

Sources/BuildTool/Platform.swift

@@ -11,9 +11,9 @@ enum Platform: String, CaseIterable {
         case .macOS:
             .fixed(platform: "macOS")
         case .iOS:
-            .lookup(destinationPredicate: .init(runtime: "iOS-18-4", deviceType: "iPhone-16"))
+            .lookup(destinationPredicate: .init(runtime: "iOS-26-2", deviceType: "iPhone-16"))
         case .tvOS:
-            .lookup(destinationPredicate: .init(runtime: "tvOS-18-4", deviceType: "Apple-TV-4K-3rd-generation-4K"))
+            .lookup(destinationPredicate: .init(runtime: "tvOS-26-2", deviceType: "Apple-TV-4K-3rd-generation-4K"))
         }
     }