Added Swiftlint to Travis

Author: freak4pc

.travis.yml

@@ -2,12 +2,16 @@ os: osx
 language: objective-c
 osx_image: xcode9
 
+install:
+  - brew update > /dev/null
+  - brew upgrade swiftlint
+
 before_script:
+  - swiftlint
   - carthage version
   - carthage bootstrap
 
 script:
   - set -o pipefail && xcodebuild test -scheme RxSwiftExt-macOS -workspace RxSwiftExt.xcworkspace  -sdk macosx -destination "arch=x86_64" | xcpretty -c 
   - set -o pipefail && xcodebuild test -scheme RxSwiftExt-iOS -workspace RxSwiftExt.xcworkspace -sdk iphonesimulator -destination "name=iPhone X" | xcpretty -c
   - set -o pipefail && xcodebuild test -scheme RxSwiftExt-tvOS -workspace RxSwiftExt.xcworkspace -sdk appletvsimulator -destination "name=Apple TV 1080p" | xcpretty -c
-