fix flicker of fast tilemap (#20387) 

setPercent after initialization (#19718) 

update versoin code (#19265) 

sync Chinese release notes with English improvements (#18832) * sync chinese release notes with English improvements * little fix * update doctoc * update releaseNotes doctoc

fix misspelling on RELEASE_NOTES.md (#18338) 

update release date (#17870) 

JSB SocketIO.connect supports to pass a CA cert file (#17736) * JSB SocketIO.connect supports to pass a CA cert file * The second parameter of SocketIO.connect function is probably a `option` object. JSB just ignores it.

[ci skip]Changelog releasenote (#17695) * update release note * update toc * update changelog

update version (#17230) 

update version and release note (#17170)