fix travis

Author: luoxiu

.travis.yml

@@ -1,6 +1,3 @@
-language: objective-c
-osx_image: xcode10.2
-
 env:
   global: 
     - PROJECT="KakaJSON.xcodeproj"
@@ -10,22 +7,30 @@ env:
 matrix:
   include:
     - os: osx
+      language: swift
+      osx_image: xcode10.2
       env:
         - SDK="iphonesimulator12.2"
         - DESTINATION="platform=iOS Simulator,name=iPhone 8,OS=12.2"
     - os: osx
+      language: swift
+      osx_image: xcode10.2
       env:
         - SDK="macosx10.14"
         - DESTINATION="arch=x86_64"
     - os: osx
+      language: swift
+      osx_image: xcode10.2
       env:
         - SDK="appletvsimulator12.0"
         - DESTINATION="OS=12.0,name=Apple TV 4K"
     - os: linux
-      sudo: required
+      language: generic
       dist: trusty
+      sudo: required
 
 before_install:
+  - echo $TRAVIS_OS_NAME
   - if [[ $TRAVIS_OS_NAME == 'osx' ]]; then
       gem install xcpretty;
     fi