Update Travis build values

Author: Qata

.travis.yml

@@ -1,5 +1,5 @@
 language: objective-c
-osx_image: xcode8.1
+osx_image: xcode9.0
 
 branches:
   except:
@@ -18,8 +18,8 @@ env:
 matrix:
   include:
     - env: SCHEME="macOS"  SDK="macosx10.12"          DESTINATION="arch=x86_64"
-    - env: SCHEME="iOS"    SDK="iphonesimulator10.1"  DESTINATION="OS=10.1,name=iPhone 6S Plus" UPDATE_DOCS="true"
-    - env: SCHEME="tvOS"   SDK="appletvsimulator10.0"  DESTINATION="OS=10.0,name=Apple TV 1080p"
+    - env: SCHEME="iOS"    SDK="iphonesimulator11.0"  DESTINATION="OS=11.0,name=iPhone 7 Plus" UPDATE_DOCS="true"
+    - env: SCHEME="tvOS"   SDK="appletvsimulator11.0"  DESTINATION="OS=11.0,name=Apple TV 1080p"
 
 script:
   - set -o pipefail