Add travis slack notifications

Author: jhersh

.travis.yml

@@ -1,11 +1,17 @@
 osx_image: xcode61
 language: objective-c
-before_install: gem install cocoapods xcpretty obcd -N
+before_install: 
+- gem install cocoapods xcpretty obcd -N
 cache: cocoapods
 podfile: Example/Podfile
 env:
-  - LC_CTYPE=en_US.UTF-8 LANG=en_US.UTF-8
+- LC_CTYPE=en_US.UTF-8 LANG=en_US.UTF-8
 script:
-  - set -o pipefail && xcodebuild -workspace Example/ExampleSSDataSources.xcworkspace -scheme ExampleSSDataSources -sdk iphonesimulator -destination "platform=iOS Simulator,name=iPhone 6" clean test | xcpretty -c
-  - pod lib lint --quick
-  - obcd --path SSDataSources find HeaderStyle
+- set -o pipefail && xcodebuild -workspace Example/ExampleSSDataSources.xcworkspace
+  -scheme ExampleSSDataSources -sdk iphonesimulator -destination "platform=iOS Simulator,name=iPhone 6" 
+  clean test | xcpretty -c
+- pod lib lint --quick
+- obcd --path SSDataSources find HeaderStyle
+notifications:
+  slack:
+    secure: Lu0j1+59o9FCSe/sM7Pf8Qx0aD7akVXaYjstbta8vGJxaW4a3w20Em1N1KHapYCYOiVHKiBOHRVcMdO+4yfA7TREinVf1sUUskgZu3Ou18Tx0bB53fRFnhE8Wz+zOYzeL89K20hEvSzHVj13/DLCwIcERXIkBKwoAjJIH8HiKi8=