update documentation
update documentation

 Author:    OverseePublic
 Date:      Sat Aug 3 19:40:58 2019 -0400

mobxjs/mobx-state-tree,mweststrate/mobx-state-tree,mobxjs/mobx-state-tree,mweststrate/mobx-state-tree,mobxjs/mobx-state-tree,mobxjs/mobx-state-tree