fix(h5): 固定 toast 大小

src/platforms/h5/components/app/popup/toast.vue

 <template>
   <transition name="uni-fade">
-    <uni-toast
-      v-if="visible"
-      :data-duration="duration"
+    <uni-toast
+      v-if="visible"
+      :data-duration="duration"
     >
-      <div
-        v-if="mask"
-        class="uni-mask"
-        style="background: transparent;"
-        @touchmove.prevent
+      <div
+        v-if="mask"
+        class="uni-mask"
+        style="background: transparent;"
+        @touchmove.prevent
       />
-      <div
-        v-if="!image&&!iconClass"
-        class="uni-sample-toast"
+      <div
+        v-if="!image&&!iconClass"
+        class="uni-sample-toast"
       >
-        <p class="uni-simple-toast__text">
-          {{ title }}
+        <p class="uni-simple-toast__text">
+          {{ title }}
         </p>
       </div>
-      <div
-        v-else
-        class="uni-toast"
+      <div
+        v-else
+        class="uni-toast"
       >
-        <img
-          v-if="image"
-          :src="image"
-          class="uni-toast__icon"
+        <img
+          v-if="image"
+          :src="image"
+          class="uni-toast__icon"
         >
-        <i
-          v-else
-          :class="iconClass"
-          class="uni-icon_toast"
+        <i
+          v-else
+          :class="iconClass"
+          class="uni-icon_toast"
         />
-        <p class="uni-toast__content">
-          {{ title }}
+        <p class="uni-toast__content">
+          {{ title }}
         </p>
       </div>
     </uni-toast>
@@ -79,7 +79,7 @@ export default {
       }
       if (this.icon === 'loading') {
         return 'uni-loading'
-      }
+      }
       return ''
     }
   },
@@ -104,6 +104,7 @@ uni-toast {
   display: block;
   box-sizing: border-box;
   pointer-events: none;
+  font-size: 16px;
 }
 
 uni-toast .uni-sample-toast {