feat(lib): 配置 format color，默认使用 el-color-picker 组件

feat: 更新schema生成器color配置

Author: lljj-x

packages/demo/src/schema-generator/views/editor/viewComponents/Color/index.js

@@ -7,8 +7,7 @@ import genSchema from '../genSchema.js';
 const viewSchema = {
     title: '颜色选择器',
     type: 'string',
-    format: 'color',
-    'ui:widget': 'el-color-picker'
+    format: 'color'
 };
 export default {
     viewSchema,

packages/lib/src/JsonSchemaForm/config/WIDGET_MAP.js

@@ -24,6 +24,7 @@ export default {
         // array: '',
     },
     formats: {
+        color: 'el-color-picker',
         time: TimePickerWidget, // 20:20:39+00:00
         date: DatePickerWidget, // 2018-11-13
         'date-time': DateTimePickerWidget, // 2018-11-13T20:20:39+00:00