Adding codecov for codecoverage.

Author: yasirfolio3

.travis.yml

@@ -42,4 +42,6 @@ jobs:
         - mkdir $HOME/travisci-tools && pushd $HOME/travisci-tools && git init && git pull https://$CI_USER_TOKEN@github.com/optimizely/travisci-tools.git && popd
       script:
         - "$HOME/travisci-tools/fsc-trigger/trigger_fullstack-sdk-compat.sh"
-      after_success: travis_terminate 0
+      after_success: 
+        - bash <(curl -s https://codecov.io/bash) -J 'OptimizelySwiftSDK-iOS'
+        - travis_terminate 0

OptimizelySDK/OptimizelySwiftSDK.xcodeproj/xcshareddata/xcschemes/OptimizelySwiftSDK-iOS.xcscheme

@@ -26,6 +26,7 @@
       buildConfiguration = "Debug"
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      codeCoverageEnabled = "YES"
       onlyGenerateCoverageForSpecifiedTargets = "YES"
       shouldUseLaunchSchemeArgsEnv = "YES">
       <CodeCoverageTargets>