Updated the Travis CI configuration.

Author: arturgrigor

.travis.yml

@@ -1,5 +1,5 @@
 language: objective-c
-osx_image: xcode11.2
+osx_image: xcode11.6
 branches:
   only:
     - master
@@ -9,13 +9,13 @@ env:
   - LANG=en_US.UTF-8
   - SCHEME="IPAPI"
   matrix:
-    - DESTINATION="OS=4.0,name=Apple Watch Series 3 - 42mm" RUN_TESTS="NO"  POD_LINT="NO"
+    - DESTINATION="OS=6.2,name=Apple Watch Series 3 - 42mm" RUN_TESTS="NO"  POD_LINT="NO"
     - DESTINATION="OS=3.2,name=Apple Watch - 42mm"          RUN_TESTS="NO"  POD_LINT="NO"
 
-    - DESTINATION="OS=13.2,name=iPhone 11 Pro Max"          RUN_TESTS="NO"  POD_LINT="NO"
+    - DESTINATION="OS=13.6,name=iPhone Xs Max"              RUN_TESTS="NO"  POD_LINT="NO"
     - DESTINATION="OS=10.3.1,name=iPad Air"                 RUN_TESTS="NO"  POD_LINT="NO"
 
-    - DESTINATION="OS=13.2,name=Apple TV"                   RUN_TESTS="NO"  POD_LINT="NO"
+    - DESTINATION="OS=13.4,name=Apple TV"                   RUN_TESTS="NO"  POD_LINT="NO"
     - DESTINATION="OS=10.2,name=Apple TV 1080p"             RUN_TESTS="NO"  POD_LINT="NO"
 
     - DESTINATION="arch=x86_64"                             RUN_TESTS="YES" POD_LINT="NO"