ci: fix the build environments

Author: scenee

.github/workflows/ci.yml

@@ -19,7 +19,7 @@ jobs:
       matrix:
         include:
           - swift: "5"
-            xcode: "16.3"
+            xcode: "16.4"
             runs-on: macos-15
           - swift: "5.10"
             xcode: "15.4"
@@ -44,7 +44,7 @@ jobs:
       matrix:
         include:
           - os: "18.4"
-            xcode: "16.3"
+            xcode: "16.4"
             sim: "iPhone 16 Pro"
             parallel: NO  # Stop random test job failures
             runs-on: macos-15
@@ -93,13 +93,13 @@ jobs:
           -sdk iphonesimulator
 
   swiftpm:
-    runs-on: macos-15
+    runs-on: ${{ matrix.runs-on }}
     env:
       DEVELOPER_DIR: /Applications/Xcode_${{ matrix.xcode }}.app/Contents/Developer
     strategy:
       fail-fast: false
       matrix:
-        xcode: ["16.3", "15.4"]
+        xcode: ["16.4", "15.4"]
         platform: [iphoneos, iphonesimulator]
         arch: [x86_64, arm64]
         exclude:
@@ -110,16 +110,20 @@ jobs:
           - platform: iphoneos
             xcode: "16.3"
             sys: "ios18.4"
+            runs-on: macos-15
           - platform: iphonesimulator
             xcode: "16.3"
             sys: "ios18.4-simulator"
+            runs-on: macos-15
           # 17.2
           - platform: iphoneos
             xcode: "15.4"
             sys: "ios17.2"
+            runs-on: macos-14
           - platform: iphonesimulator
             xcode: "15.4"
             sys: "ios17.2-simulator"
+            runs-on: macos-14
     steps:
     - uses: actions/checkout@v4
     - name: "Swift Package Manager build"