Update CI

.github/workflows/ci.yml

@@ -13,45 +13,31 @@ on:
     branches:
       - main
 
-env:
-  DEVELOPER_DIR: /Applications/Xcode_15.0.app/Contents/Developer
-
 jobs:
   apple_test:
     name: Test
-    runs-on: macOS-13
+    runs-on: macOS-14
+    env:
+      DEVELOPER_DIR: /Applications/Xcode_16.0.app/Contents/Developer
     strategy:
       matrix:
         destination:
           - "platform=macOS"
-          - "platform=iOS Simulator,name=iPhone 12"
+          - "platform=iOS Simulator,name=iPhone 15"
 
     steps:
       - uses: actions/checkout@v4
       - name: Test platform ${{ matrix.destination }}
         run: set -o pipefail && xcodebuild -scheme LanguageServerProtocol -destination "${{ matrix.destination }}" test | xcpretty
 
   linux_test:
-    name: Test Linux 5.8.1
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      - name: Install swiftly
-        run: curl -L https://swift-server.github.io/swiftly/swiftly-install.sh | bash -s -- -y
-      - name: Install the latest Swift toolchain
-        run: swiftly install 5.8.1
-      - name: Test
-        run: swift test
-
-  linux_latest_test:
     name: Test Linux
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
         uses: actions/checkout@v4
       - name: Install swiftly
-        run: curl -L https://swift-server.github.io/swiftly/swiftly-install.sh | bash -s -- -y
+        run: curl -L https://swiftlang.github.io/swiftly/swiftly-install.sh | bash -s -- -y
       - name: Install the latest Swift toolchain
         run: swiftly install latest
       - name: Test