Update CHANGELOG for version 2.4.0
Update CHANGELOG for version 2.4.0

0xced/XCDYouTubeKit,mingsai/XCDYouTubeVideoPlayerViewController,kumabook/XCDYouTubeKit,twobitlabs/XCDYouTubeKit,morrisirrom/XCDYouTubeKit,0xced/XCDYouTubeKit,0xced/XCDYouTubeKit,creationst/XCDYouTubeKit,gshaviv/XCDYouTubeVideoPlayerViewController,twobitlabs/XCDYouTubeKit,itamaker/XCDYouTubeKit,twobitlabs/XCDYouTubeKit,creationst/XCDYouTubeKit,0xced/XCDYouTubeKit,morrisirrom/XCDYouTubeKit,creationst/XCDYouTubeKit,gshaviv/XCDYouTubeVideoPlayerViewController,morrisirrom/XCDYouTubeKit,mingsai/XCDYouTubeVideoPlayerViewController,kumabook/XCDYouTubeKit,morrisirrom/XCDYouTubeKit,morrisirrom/XCDYouTubeKit,itamaker/XCDYouTubeKit,gshaviv/XCDYouTubeVideoPlayerViewController,kumabook/XCDYouTubeKit,kumabook/XCDYouTubeKit,kumabook/XCDYouTubeKit,kumabook/XCDYouTubeKit,c0unt0/XCDYouTubeKit,mingsai/XCDYouTubeVideoPlayerViewController,gshaviv/XCDYouTubeVideoPlayerViewController,creationst/XCDYouTubeKit,c0unt0/XCDYouTubeKit,c0unt0/XCDYouTubeKit,mingsai/XCDYouTubeVideoPlayerViewController,twobitlabs/XCDYouTubeKit,c0unt0/XCDYouTubeKit,gshaviv/XCDYouTubeVideoPlayerViewController,gshaviv/XCDYouTubeVideoPlayerViewController,c0unt0/XCDYouTubeKit