feat:修复部分报错

@@ -18,10 +18,10 @@ class WsDataAccount
         foreach ($data[0]['details'] as $item) {
             $asset = new Asset();
             $asset->coin = $item['ccy'];
-            $asset->totalRight = $item['availBal'];
-            $asset->avail = $item['availEq'];
-            $asset->frozen = $item['frozenBal'];
-            $asset->upl = $item['upl'];
+            $asset->totalRight = (float)$item['availBal'];
+            $asset->avail = (float)$item['availEq'];
+            $asset->frozen = (float)$item['frozenBal'];
+            $asset->upl = (float)$item['upl'];
             $assets[$asset->coin] = $asset;
         }
         return new WsDataAccount($assets);