.travis.yml in simctl-1.6.5 vs .travis.yml in simctl-1.6.6

@@ -1,18 +1,18 @@
 language: objective-c
 matrix:
   include:
     - os: osx
-      osx_image: xcode8.3
+      osx_image: xcode10.3
       env: CUSTOM_DEVICE_SET_PATH=true
     - os: osx
-      osx_image: xcode8.3
+      osx_image: xcode10.3
       env: CUSTOM_DEVICE_SET_PATH=false
     - os: osx
-      osx_image: xcode9
+      osx_image: xcode11
       env: CUSTOM_DEVICE_SET_PATH=true
     - os: osx
-      osx_image: xcode9
+      osx_image: xcode11
       env: CUSTOM_DEVICE_SET_PATH=false
 before_script:
   - export LANG=en_US.UTF-8
 install: bundle
 script: