Use available simulator for CI (#1404)

Author: kroikie

.cirrus.yml

@@ -80,7 +80,7 @@ task:
   activate_script: pub global activate flutter_plugin_tools
   create_simulator_script:
     - xcrun simctl list
-    - xcrun simctl create Flutter-iPhone com.apple.CoreSimulator.SimDeviceType.iPhone-X com.apple.CoreSimulator.SimRuntime.iOS-12-2 | xargs xcrun simctl boot
+    - xcrun simctl create Flutter-iPhone com.apple.CoreSimulator.SimDeviceType.iPhone-X com.apple.CoreSimulator.SimRuntime.iOS-13-2 | xargs xcrun simctl boot
   matrix:
     - name: build-ipas+drive-examples
       env: