[Bug]: The onFinish event does not come to the Image

### 发生了什么问题？ The onFinish event triggered when the animation playback in the loaded SVG image is complete ``` Image("resources/rawfile/bouncing-ball.svg") .width(100) .height(100) .onFinish(() => { console.info('onFinish: ok') }) ``` The onFinish event is not triggered in this code. bouncing-ball.svg: ``` <svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 200 200'><rect fill='#FF156D' stroke='#FF156D' stroke-width='15' stroke-linejoin='round' width='30' height='30' x='85' y='85' rx='0' ry='0'><animate attributeName='rx' calcMode='spline' dur='2' values='15;15;5;15;15' keySplines='.5 0 .5 1;.8 0 1 .2;0 .8 .2 1;.5 0 .5 1' repeatCount='indefinite'></animate><animate attributeName='ry' calcMode='2' dur='2' values='15;15;10;15;15' keySplines='.5 0 .5 1;.8 0 1 .2;0 .8 .2 1;.5 0 .5 1' repeatCount='2'></animate><animate attributeName='height' calcMode='spline' dur='2' values='30;30;1;30;30' keySplines='.5 0 .5 1;.8 0 1 .2;0 .8 .2 1;.5 0 .5 1' repeatCount='2'></animate><animate attributeName='y' calcMode='spline' dur='2' values='40;170;40;' keySplines='.6 0 1 .4;0 .8 .2 1' repeatCount='2'></animate></rect></svg> ``` ### 期望行为是什么？ The onFinish event is triggered. ### 如何复现该缺陷 Use the code above with bouncing-ball.svg. ### 其他补充信息 ### 版本或分支信息 - [x] master - [x] 5.1-Release - [ ] 5.0-Release - [ ] 5.0-Beta1 - [ ] Release 4.1 - [ ] Release 4.0 - [ ] Release 3.2