perf: 优化size自适应

src/components/ReSegmented/src/index.tsx

@@ -92,11 +92,15 @@ export default defineComponent({
       });
     }
 
+    function handleResizeInit() {
       useResizeObserver(".pure-segmented", () => {
         nextTick(() => {
           handleInit(curIndex.value);
         });
       });
+    }
+
+    props.block && handleResizeInit();
 
     watch(
       () => curIndex.value,
@@ -111,6 +115,11 @@ export default defineComponent({
       }
     );
 
+    watch(() => props.size, handleResizeInit, {
+      deep: true,
+      immediate: true
+    });
+
     const rendLabel = () => {
       return props.options.map((option, index) => {
         return (