[CI] macOS 11 and Xcode 12.5

Author: ikesyo

.github/workflows/ci-swiftpm.yml

@@ -13,10 +13,10 @@ on:
 jobs:
   swiftpm_darwin:
     name: SwiftPM, Darwin, Xcode ${{ matrix.xcode }}
-    runs-on: macos-latest
+    runs-on: macos-11
     strategy:
       matrix:
-        xcode: [12.4]
+        xcode: [12.4, 12.5]
     env:
       DEVELOPER_DIR: /Applications/Xcode_${{ matrix.xcode }}.app
     steps:

.github/workflows/ci-xcode.yml

@@ -13,10 +13,10 @@ on:
 jobs:
   xcode:
     name: Xcode ${{ matrix.xcode }} - ${{ matrix.platform }}
-    runs-on: macos-latest
+    runs-on: macos-11
     strategy:
       matrix:
-        xcode: [12.4]
+        xcode: [12.4, 12.5]
         platform: [macos, ios, tvos]
       fail-fast: false
     env:

.github/workflows/cocoapods.yml

@@ -13,7 +13,7 @@ on:
 jobs:
   cocoapods:
     name: CocoaPods Lint
-    runs-on: macos-latest
+    runs-on: macos-11
     steps:
       - uses: actions/checkout@v2
       - uses: ruby/setup-ruby@v1