Ensure we compile with Xcode 12

Author: djbe

.circleci/config.yml

@@ -6,7 +6,7 @@ defaults:
       CIRCLE_TEST_REPORTS: /tmp/circleci-test-results
       BUNDLE_PATH: vendor/bundle
     macos:
-      xcode: "11.4.0"
+      xcode: "12.0.0"
     shell: /bin/bash --login -eo pipefail
   - &prepare-storage
     run:

Rakefile

@@ -17,7 +17,7 @@ SCHEME_NAME = 'swiftgen'
 CONFIGURATION = 'Debug'
 RELEASE_CONFIGURATION = 'Release'
 POD_NAME = 'SwiftGen'
-MIN_XCODE_VERSION = 11.4
+MIN_XCODE_VERSION = 12.0
 
 BUILD_DIR = File.absolute_path('./build')
 BIN_NAME = 'swiftgen'