* master: (61 commits)
Update Travis config for Xcode 10.
Add test for object posting notification
update README.md, the old "Foundation URL Loading System" link is 404
Change test name to correct one
Change default teardown methods to tests
Update tests to use new API
Update PR feedback, add more tests
remove temporary method that could be doing nothing
Update HTTPBin certificates.
Chinese CONTRIBUTING.md translate
Chinese Contributing.md translate
rollback method 'AFPostReachabilityStatusChange'
Use AFNetworkReachabilityManager to compare consistency of notification posts and gets, instead of SCNetworkReachabilityRef. And test case reference.
Remove test that is nilling session manually as it's not possible anymore to not have valid session (correctly)
Add tests for verifing reachability manager consistence for notification posting and getting
Specify Xcode 9.4 in Travis file.
Add an ability that notification-observer know which reachability its belong