update mcaos image

.github/workflows/build.yml

@@ -17,7 +17,7 @@ jobs:
       env:
         GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
   build_and_deploy_ios:
-    runs-on: [macos-latest]
+    runs-on: [macos-11]
     steps:
       - uses: actions/checkout@v2
       - name: Install RubyGems

.github/workflows/build_nightly.yml

@@ -17,7 +17,7 @@ jobs:
       env:
         GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
   build_and_deploy_ios:
-    runs-on: [macos-latest]
+    runs-on: [macos-11]
     steps:
       - uses: actions/checkout@v2
       - name: Install RubyGems

packages/stream_chat_v1/ios/Gemfile

@@ -1,7 +1,6 @@
 source "https://rubygems.org"
 
 gem "fastlane"
-gem "xcode-install"
 
 plugins_path = File.join(File.dirname(__FILE__), 'fastlane', 'Pluginfile')
 eval_gemfile(plugins_path) if File.exist?(plugins_path)

packages/stream_chat_v1/ios/fastlane/Fastfile

@@ -34,8 +34,6 @@ platform :ios do
     desc "Deploy build to Firebase"
     lane :deploy_to_firebase do
         match_me
-        xcode_install(version: "13.0")
-        xcversion(version: "~> 13.0.0")
        
         gym(
             workspace: "./Runner.xcworkspace",
@@ -61,8 +59,6 @@ platform :ios do
     desc "Deploy build to TestFlight"
     lane :deploy_to_testflight do
         match_appstore
-        xcode_install(version: "13.0")
-        xcversion(version: "~> 13.0.0")
 
         settings_to_override = {
           :BUNDLE_IDENTIFIER => "io.getstream.flutter",