* Add source and options params to Form.ValidationRule.validator function
As per rules section of async-validation readme: https://github.com/yiminghe/async-validator#rules
* Make prefixCls optional in MentionProps interface
#### FEATURES
* use `ContentState` instead of `EditorState`, selection events won't trigger
onChange anymore.
* deprecated `Mention.toEditorState`, instead of `Mention.toContentState`,
* `Mention.toEditorState` are compatibled, but have a warnning in console.
#### ISSUES
* `disabled` and `readOnly` props supported.
* fixed controlled mode bug.
* close#5788
* close#5175
* close #https://github.com/react-component/editor-mention/issues/7
* Unify name of ReactNode type in document
* Lowser all string type name
* Lowercase all number type name
* Lowercase all boolean type name
* Unify array type
* Lowercase all object type name
* Unify mutilple types
* Add new color patterns algorithm
* Add color palettes
* update other colors
* fix gray color
* update more tint/shade to colorPalette
* new font color
* Update doc for new color system
* improve doc style
* remove unnecessary computed props for classNames
* rollback autocomplete optimization for possible css style order issue
* update snapshots
* remove more unnecessary computed props at Input
+ add `getSuggestionContainer` callback function, which allow users modify the
container element of suggestions dropdown.
+ the suggestions dropdown will mount on `document.body` defaultly, instead of
on editor.
+ close#3588
afc163
Jordan Hornblow
Benjy Cui
陆离
Graeme Yeates
HJin.me
Wei Zhu
ddcat1115
caoyi
Andrey G
cathayandy
Bruce Mitchener