fixed bug of definition of utils:: getCascadeBoundingBox()
Merge pull request #8876 from SunLightJuly/fix_bug

fixed bug of definition of utils:: getCascadeBoundingBox()
update release note
Merge pull request #8877 from minggo/update-release-note

[ci skip]update release note
Merge branch 'v3' of https://github.com/cocos2d/cocos2d-x into v3_new_spine