5.0.4-beta podspec

update podspec to 5.0.3-beta & update readme

update podspec to 5.0.2-beta

update podspec to 5.0.1

podspec 5.0.0 release

Merge branch 'dev_for_swift5.0' of https://github.com/alibaba/HandyJSON…

… into dev_for_swift5.0

update .swift-version

update podspec & release 4.2.1