update to xcode11.3.1 image

.travis.yml

@@ -3,7 +3,7 @@
 # * https://github.com/supermarin/xcpretty#usage
 
 os: osx
-osx_image: xcode10.2
+osx_image: xcode11.3
 language: swift
 env: 
   global:
@@ -16,14 +16,13 @@ env:
   - EXAMPLE_SCHEME="CoreGPX-Example"
   - TEST_SCHEME="CoreGPX Tests"
   matrix:
-  - DESTINATION="OS=5.2,name=Apple Watch Series 4 - 44mm" SCHEME="$WATCHOS_FRAMEWORK_SCHEME" RUN_TESTS="NO" BUILD_EXAMPLE="NO" SDK="watchsimulator5.2"
-  - DESTINATION="OS=2.0,name=Apple Watch - 38mm" SCHEME="$WATCHOS_FRAMEWORK_SCHEME" RUN_TESTS="NO" BUILD_EXAMPLE="NO" SDK="watchsimulator5.2"
+  - DESTINATION="OS=6.1,name=Apple Watch Series 5 - 44mm" SCHEME="$WATCHOS_FRAMEWORK_SCHEME" RUN_TESTS="NO"  BUILD_EXAMPLE="NO"  SDK="watchsimulator6.1"
 
-  - DESTINATION="OS=12.2,name=iPhone XS"       SCHEME="$IOS_FRAMEWORK_SCHEME" RUN_TESTS="NO" BUILD_EXAMPLE="YES" SDK="iphonesimulator12.2"
-  - DESTINATION="OS=12.2,name=iPhone XS"       SCHEME="$IOS_FRAMEWORK_SCHEME" RUN_TESTS="YES" BUILD_EXAMPLE="NO" SDK="iphonesimulator12.2"
-  - DESTINATION="OS=10.3.1,name=iPhone 6 Plus" SCHEME="$IOS_FRAMEWORK_SCHEME" RUN_TESTS="NO" BUILD_EXAMPLE="NO" SDK="iphonesimulator12.2"
+  - DESTINATION="OS=13.3,name=iPhone 11"                  SCHEME="$IOS_FRAMEWORK_SCHEME"     RUN_TESTS="NO"  BUILD_EXAMPLE="YES" SDK="iphonesimulator13.2"
+  - DESTINATION="OS=13.3,name=iPhone 11"                  SCHEME="$IOS_FRAMEWORK_SCHEME"     RUN_TESTS="YES" BUILD_EXAMPLE="NO"  SDK="iphonesimulator13.2"
+  - DESTINATION="OS=10.3,name=iPhone 6 Plus"              SCHEME="$IOS_FRAMEWORK_SCHEME"     RUN_TESTS="NO"  BUILD_EXAMPLE="NO"  SDK="iphonesimulator13.2"
 
-  - DESTINATION="arch=x86_64" SCHEME="$MACOS_FRAMEWORK_SCHEME" RUN_TESTS="NO" BUILD_EXAMPLE="NO" SDK="macosx10.14"
+  - DESTINATION="arch=x86_64" SCHEME="$MACOS_FRAMEWORK_SCHEME" RUN_TESTS="NO" BUILD_EXAMPLE="NO" SDK="macosx10.15"
 
 script:
   - set -o pipefail