[wordpress__blocks]: Add Children attributes (#42858)
[wordpress__blocks]: Add Children attributes (#42858)

* Add Children attributes

* Add as author
georgemarshall/DefinitelyTyped,georgemarshall/DefinitelyTyped,mcliment/DefinitelyTyped,dsebastien/DefinitelyTyped,dsebastien/DefinitelyTyped,georgemarshall/DefinitelyTyped,markogresak/DefinitelyTyped,georgemarshall/DefinitelyTyped