[improvement] Toast: optimize loading-type default value

packages/toast/Toast.js

@@ -11,16 +11,13 @@ export default sfc({
 
   props: {
     className: null,
+    loadingType: String,
     forbidClick: Boolean,
     message: [String, Number],
     type: {
       type: String,
       default: 'text'
     },
-    loadingType: {
-      type: String,
-      default: 'circular'
-    },
     position: {
       type: String,
       default: 'middle'

packages/toast/index.js

@@ -12,7 +12,7 @@ const defaultOptions = {
   duration: 3000,
   position: 'middle',
   forbidClick: false,
-  loadingType: 'circular',
+  loadingType: undefined,
   getContainer: 'body',
   overlayStyle: null
 };