message: Test on CI with sync 1.x as well.
diff: @@ -172,8 +172,9 @@ stage('unit-tests') {
  linux_sync: doDockerBuild('linux', true, true),
  android: doAndroidDockerBuild(),
  macos: doBuild('osx', 'macOS', false, ''),
  - macos_1_x: doBuild('osx', 'macOS', false, '-1.x'),
  macos_sync: doBuild('osx', 'macOS', true, ''),
  + macos_1_x: doBuild('osx', 'macOS', false, '-1.x'),
  + macos_1_x_sync: doBuild('osx', 'macOS', true, '-1.x'),
  win32: doWindowsBuild(),
  windows_universal: doWindowsUniversalBuild()
  )
  