Update GitHub Actions to Xcode 11.4. (#3134)

* Move to Xcode 11.4.

* Fix format.

* No seriously.

* Name macOS jobs.

* Update for actual 11.4 install path.

.github/workflows/ci.yml

@@ -10,8 +10,8 @@ on:
       - '*'
 
 jobs:
-  macOS:
-    name: Test macOS 
+  macOS_5_1:
+    name: Test macOS (5.1)
     runs-on: macOS-latest
     env: 
       DEVELOPER_DIR: /Applications/Xcode_11.3.1.app/Contents/Developer
@@ -19,11 +19,20 @@ jobs:
       - uses: actions/checkout@v2
       - name: macOS
         run: set -o pipefail && env NSUnbufferedIO=YES xcodebuild -project "Alamofire.xcodeproj" -scheme "Alamofire macOS" -destination "platform=macOS" clean test | xcpretty
+  macOS_5_2:
+    name: Test macOS (5.2)
+    runs-on: macOS-latest
+    env: 
+      DEVELOPER_DIR: /Applications/Xcode_11.4.app/Contents/Developer
+    steps:
+      - uses: actions/checkout@v2
+      - name: macOS
+        run: set -o pipefail && env NSUnbufferedIO=YES xcodebuild -project "Alamofire.xcodeproj" -scheme "Alamofire macOS" -destination "platform=macOS" clean test | xcpretty
   Catalyst:
     name: Test Catalyst 
     runs-on: macOS-latest
     env: 
-      DEVELOPER_DIR: /Applications/Xcode_11.3.1.app/Contents/Developer
+      DEVELOPER_DIR: /Applications/Xcode_11.4.app/Contents/Developer
     steps:
       - uses: actions/checkout@v2
       - name: Catalyst
@@ -32,10 +41,10 @@ jobs:
     name: Test iOS 
     runs-on: macOS-latest
     env: 
-      DEVELOPER_DIR: /Applications/Xcode_11.3.1.app/Contents/Developer
+      DEVELOPER_DIR: /Applications/Xcode_11.4.app/Contents/Developer
     strategy:
       matrix:
-        destination: ["OS=13.3,name=iPhone 11 Pro"] #, "OS=12.4,name=iPhone XS", "OS=11.4,name=iPhone X", "OS=10.3.1,name=iPhone SE"]
+        destination: ["OS=13.4,name=iPhone 11 Pro"] #, "OS=12.4,name=iPhone XS", "OS=11.4,name=iPhone X", "OS=10.3.1,name=iPhone SE"]
     steps:
       - uses: actions/checkout@v2
       - name: iOS - ${{ matrix.destination }}
@@ -44,10 +53,10 @@ jobs:
     name: Test tvOS 
     runs-on: macOS-latest
     env: 
-      DEVELOPER_DIR: /Applications/Xcode_11.3.1.app/Contents/Developer
+      DEVELOPER_DIR: /Applications/Xcode_11.4.app/Contents/Developer
     strategy:
       matrix:
-        destination: ["OS=13.3,name=Apple TV 4K"] #, "OS=11.4,name=Apple TV 4K", "OS=10.2,name=Apple TV 1080p"]
+        destination: ["OS=13.4,name=Apple TV 4K"] #, "OS=11.4,name=Apple TV 4K", "OS=10.2,name=Apple TV 1080p"]
     steps:
       - uses: actions/checkout@v2
       - name: tvOS - ${{ matrix.destination }}
@@ -56,10 +65,10 @@ jobs:
     name: Build watchOS
     runs-on: macOS-latest
     env: 
-      DEVELOPER_DIR: /Applications/Xcode_11.3.1.app/Contents/Developer
+      DEVELOPER_DIR: /Applications/Xcode_11.4.app/Contents/Developer
     strategy:
       matrix:
-        destination: ["OS=6.1.1,name=Apple Watch Series 5 - 44mm"] #, "OS=4.2,name=Apple Watch Series 3 - 42mm", "OS=3.2,name=Apple Watch Series 2 - 42mm"]
+        destination: ["OS=6.2,name=Apple Watch Series 5 - 44mm"] #, "OS=4.2,name=Apple Watch Series 3 - 42mm", "OS=3.2,name=Apple Watch Series 2 - 42mm"]
     steps:
       - uses: actions/checkout@v2
       - name: watchOS - ${{ matrix.destination }}
@@ -68,7 +77,7 @@ jobs:
     name: Test with SPM
     runs-on: macOS-latest    
     env: 
-      DEVELOPER_DIR: /Applications/Xcode_11.3.1.app/Contents/Developer
+      DEVELOPER_DIR: /Applications/Xcode_11.4.app/Contents/Developer
     steps:
       - uses: actions/checkout@v2
       - name: SPM Test