New Feature--add Event "brushEnd"

src/component/brush/BrushView.js

@@ -107,6 +107,12 @@ export default echarts.extendComponentView({
             areas: zrUtil.clone(areas),
             $from: modelId
         });
+        opt.isEnd && this.api.dispatchAction({
+            type: 'brushEnd',
+            brushId: modelId,
+            areas: zrUtil.clone(areas),
+            $from: modelId
+        });
     }
 
 });

src/component/brush/brushAction.js

@@ -60,4 +60,9 @@ echarts.registerAction(
 echarts.registerAction(
     {type: 'brushSelect', event: 'brushSelected', update: 'none'},
     function () {}
-);
\ No newline at end of file
+);
+
+echarts.registerAction(
+    {type: 'brushEnd', event: 'brushEnd', update: 'none'},
+    function () {}
+);