Merge pull request #317 from bizz84/feature/travis-update-xcode-9.2

Use Xcode 9.2 image

.travis.yml

@@ -1,5 +1,5 @@
 language: objective-c
-osx_image: xcode8.3
+osx_image: xcode9.2
 
 before_install:
   - gem install xcpretty

scripts/build.sh

@@ -23,4 +23,4 @@ echo ""
 echo "${bold}/****************************/"
 echo "/* Run: SwiftyStoreKitTests */"
 echo "/****************************/${normal}"
-set -o pipefail && xcodebuild test -project SwiftyStoreKit.xcodeproj -scheme SwiftyStoreKitTests -sdk iphonesimulator -destination 'platform=iOS Simulator,name=iPhone 6,OS=10.3.1' | tee xcodebuild.log | xcpretty
+set -o pipefail && xcodebuild test -project SwiftyStoreKit.xcodeproj -scheme SwiftyStoreKitTests -sdk iphonesimulator -destination 'platform=iOS Simulator,name=iPhone 6,OS=11.2' | tee xcodebuild.log | xcpretty