Add sleep to .travis.yml in attempt to fix travis-ci/travis-ci/issues/4725

Author: hamchapman

.travis.yml

@@ -43,4 +43,6 @@ script:
       xcodebuild -workspace PusherSwift.xcworkspace -scheme "$SCHEME" -destination "$DESTINATION" -sdk "$SDK" CODE_SIGN_IDENTITY="" CODE_SIGNING_REQUIRED=NO test -enableCodeCoverage YES | xcpretty -tc;
     else
       xcodebuild -workspace PusherSwift.xcworkspace -scheme "$SCHEME" -destination "$DESTINATION" -sdk "$SDK" test -enableCodeCoverage YES | xcpretty -tc;
-    fi
+    fi
+after_success:
+  - sleep 5