Updated osx_image to xcode8.2, close #334

Summary:
- Updated `osx_image` in Travis to `xcode8.2`, as in: #334
- Doesn't require tests, as it'll either pass with no changes to the codebase or break CI. 🤷🏽‍♂️

- [x] All tests pass. Demo project builds and runs.
- [x] I added tests, an experiment, or detailed why my change isn't tested.
- [x] I have reviewed the [contributing guide](https://github.com/Instagram/IGListKit/blob/master/.github/CONTRIBUTING.md)
Closes #350

Differential Revision: D4365178

Pulled By: jessesquires

fbshipit-source-id: 9b21ef59fbda819a3fccf2b0670870f287475e03

.travis.yml

@@ -1,5 +1,5 @@
 language: objective-c
-osx_image: xcode8.1
+osx_image: xcode8.2
 
 cache:
   - cocoapods
@@ -14,8 +14,8 @@ env:
    - TVOS_SCHEME="IGListKit-tvOS"
    - MACOS_SCHEME="IGListKit-macOS"
 
-   - IOS_SDK=iphonesimulator10.1
-   - TVOS_SDK=appletvsimulator10.0
+   - IOS_SDK=iphonesimulator10.2
+   - TVOS_SDK=appletvsimulator10.1
    - MACOS_SDK=macosx10.12
 
    - IOS_EXAMPLE_WORKSPACE="Examples/Examples-iOS/IGListKitExamples.xcworkspace"
@@ -36,6 +36,7 @@ env:
 
    - DESTINATION="OS=10.0,name=iPhone 6s" SDK="$IOS_SDK" SCHEME="$IOS_SCHEME" RUN_TESTS="YES" BUILD_EXAMPLE="YES" RUN_UI_TESTS="NO" POD_LINT="NO"
    - DESTINATION="OS=10.1,name=iPhone 6s" SDK="$IOS_SDK" SCHEME="$IOS_SCHEME" RUN_TESTS="YES" BUILD_EXAMPLE="NO"  RUN_UI_TESTS="YES" POD_LINT="NO"
+   - DESTINATION="OS=10.2,name=iPad Air 2" SDK="$IOS_SDK" SCHEME="$IOS_SCHEME" RUN_TESTS="YES" BUILD_EXAMPLE="NO"  RUN_UI_TESTS="NO" POD_LINT="NO"
 
    - DESTINATION="OS=9.0,name=Apple TV 1080p"  SDK="$TVOS_SDK" SCHEME="$TVOS_SCHEME" RUN_TESTS="YES" BUILD_EXAMPLE="YES" RUN_UI_TESTS="NO" POD_LINT="NO"
    - DESTINATION="OS=10.0,name=Apple TV 1080p" SDK="$TVOS_SDK" SCHEME="$TVOS_SCHEME" RUN_TESTS="YES" BUILD_EXAMPLE="YES" RUN_UI_TESTS="NO" POD_LINT="NO"