Update TravisCI settings

- Use Xcode 10.1
- Remove build for iOS 9.3
- Use tvOS and iOS 12.1
- Use watchOS  5.1

.travis.yml

@@ -1,5 +1,5 @@
 os: osx
-osx_image: xcode10
+osx_image: xcode10.1
 branches:
   only:
     - master
@@ -14,13 +14,12 @@ env:
   - TVOS_FRAMEWORK_SCHEME="SQift tvOS CI"
   - WATCHOS_FRAMEWORK_SCHEME="SQift watchOS"
   matrix:
-    - DESTINATION="OS=12.0,name=iPhone XS"                  SCHEME="$IOS_FRAMEWORK_SCHEME"     RUN_TESTS="YES" BUILD_EXAMPLE="YES" POD_LINT="YES"
+    - DESTINATION="OS=12.1,name=iPhone XS"                  SCHEME="$IOS_FRAMEWORK_SCHEME"     RUN_TESTS="YES" BUILD_EXAMPLE="YES" POD_LINT="YES"
     - DESTINATION="OS=11.3,name=iPhone X"                   SCHEME="$IOS_FRAMEWORK_SCHEME"     RUN_TESTS="YES" BUILD_EXAMPLE="YES" POD_LINT="NO"
     - DESTINATION="OS=10.3.1,name=iPhone 7"                 SCHEME="$IOS_FRAMEWORK_SCHEME"     RUN_TESTS="YES" BUILD_EXAMPLE="YES" POD_LINT="NO"
-    - DESTINATION="OS=9.3,name=iPhone 4S"                   SCHEME="$IOS_FRAMEWORK_SCHEME"     RUN_TESTS="YES" BUILD_EXAMPLE="YES" POD_LINT="NO"
     - DESTINATION="arch=x86_64"                             SCHEME="$MACOS_FRAMEWORK_SCHEME"   RUN_TESTS="YES" BUILD_EXAMPLE="NO"  POD_LINT="NO"
-    - DESTINATION="OS=12.0,name=Apple TV 4K"                SCHEME="$TVOS_FRAMEWORK_SCHEME"    RUN_TESTS="YES" BUILD_EXAMPLE="NO"  POD_LINT="NO"
-    - DESTINATION="OS=5.0,name=Apple Watch Series 4 - 44mm" SCHEME="$WATCHOS_FRAMEWORK_SCHEME" RUN_TESTS="NO"  BUILD_EXAMPLE="NO"  POD_LINT="NO"
+    - DESTINATION="OS=12.1,name=Apple TV 4K"                SCHEME="$TVOS_FRAMEWORK_SCHEME"    RUN_TESTS="YES" BUILD_EXAMPLE="NO"  POD_LINT="NO"
+    - DESTINATION="OS=5.1,name=Apple Watch Series 4 - 44mm" SCHEME="$WATCHOS_FRAMEWORK_SCHEME" RUN_TESTS="NO"  BUILD_EXAMPLE="NO"  POD_LINT="NO"
 
 before_install:
   - gem update bundler