fix: 解决合并会修改原属性的bug

src/packages/components/Charts/Pies/PieCommon/config.ts

@@ -15,7 +15,7 @@ export default class Config extends publicConfig implements CreateComponentType
     },
     legend: {
       top: '5%',
-      left: 'center',
+      left: 'center'
     },
     series: [
       {

src/packages/public/chart.ts

@@ -22,5 +22,5 @@ export const mergeTheme = <T, U, E extends keyof U> (
   themeSetting: U,
   includes: E[] = []
 ) => {
-  return merge(pick(themeSetting, includes), option)
+  return merge({}, pick(themeSetting, includes), option)
 }