update travis

.travis.yml

@@ -5,8 +5,9 @@ language: objective-c
 before_install:
 - export LANG=en_US.UTF-8
 - gem install cocoapods
-#- brew update
-#- if brew outdated | grep -qx xctool; then brew upgrade xctool; fi
 
 script:
-- xcodebuild clean build test -workspace JSQMessages.xcworkspace -scheme JSQMessages -sdk iphonesimulator ONLY_ACTIVE_ARCH=NO
+- xcodebuild clean build test -workspace JSQMessages.xcworkspace -scheme JSQMessages -sdk iphonesimulator ONLY_ACTIVE_ARCH=NO GCC_INSTRUMENT_PROGRAM_FLOW_ARCS=YES GCC_GENERATE_TEST_COVERAGE_FILES=YES
+
+after_success:
+- bash <(curl -s https://codecov.io/bash)