Allow setting xcode version in fastfile

Gemfile

@@ -5,3 +5,4 @@ gem 'fastlane'
 gem 'anbt-sql-formatter'
 # The current head of cocoapods-binary drops acknowledgements
 gem 'cocoapods-binary', git: 'https://github.com/signalapp/cocoapods-binary.git', branch: 'jrose/acknowledgements'
+gem 'xcode-install'

Gemfile.lock

@@ -260,6 +260,9 @@ GEM
     unicode-display_width (1.7.0)
     webrick (1.7.0)
     word_wrap (1.0.0)
+    xcode-install (2.7.0)
+      claide (>= 0.9.1, < 1.1.0)
+      fastlane (>= 2.1.0, < 3.0.0)
     xcodeproj (1.19.0)
       CFPropertyList (>= 2.3.3, < 4.0)
       atomos (~> 0.1.3)
@@ -279,6 +282,7 @@ DEPENDENCIES
   cocoapods
   cocoapods-binary!
   fastlane
+  xcode-install
 
 BUNDLED WITH
    1.17.2

fastlane/Fastfile

@@ -17,6 +17,8 @@ default_platform(:ios)
 
 desc 'Build, Archive, and Upload to ASC'
 lane :release do |options|
+  xcversion(version: '12.5')
+
   app_identifier = ENV['APP_IDENTIFIER']
   scheme = ENV['SCHEME']
   configuration = 'App Store Release'