release version 4.0.2

update changelog

Merge pull request HHK1#45 from HHK1/swift5

update project for swift 5.0

archive for carthage

remove swift-version file

use correct info plist for framework

Merge pull request HHK1#10 from prynt/preparePodRelease

Bump version number

update version number and changelog

update podspec

update podspec