fix: timer ts error

Author: szg2008

src/packages/__VUE/notify/index.taro.vue

@@ -55,7 +55,7 @@ export default create({
     };
 
     // timer
-    let timer: null | number = null;
+    let timer: null | NodeJS.Timeout = null;
     const clearTimer = () => {
       timer && clearTimeout(timer);
       timer = null;

src/packages/__VUE/toast/index.taro.vue

@@ -105,7 +105,7 @@ export default create({
   },
   emits: ['update:visible', 'closed'],
   setup(props, { emit }) {
-    let timer: number | null | undefined;
+    let timer: NodeJS.Timeout | null | undefined;
     const clearTimer = () => {
       if (timer) {
         clearTimeout(timer);