Update travis image to Xcode 8.3 (#11)

* Update travis image to Xcode 8.3

* Run tests on iPhone 7, iOS 10.3

Author: garriguv

.travis.yml

@@ -1,5 +1,5 @@
 language: objective-c
-osx_image: xcode8
+osx_image: xcode8.3
 env:
   global:
   - FRAMEWORK_NAME=SQLiteMigrationManager

bin/run-tests

@@ -4,8 +4,8 @@ main() {
   xcodebuild \
     -workspace SQLiteMigrationManager.xcworkspace \
     -scheme SQLiteMigrationManager\
-    -sdk iphonesimulator10.0\
-    -destination "platform=iOS Simulator,name=iPhone 6,OS=10.0"\
+    -sdk iphonesimulator10.3\
+    -destination "platform=iOS Simulator,name=iPhone 7,OS=10.3"\
     test
 }
 main