chore: update version to 1.3.9 for improved stability

manifest.json

@@ -2,8 +2,8 @@
     "name" : "小葫芦",
     "appid" : "__UNI__DDAE2E0",
     "description" : "",
-    "versionName" : "1.3.8",
-    "versionCode" : 138,
+    "versionName" : "1.3.9",
+    "versionCode" : 139,
     "transformPx" : false,
     "app-plus" : {
         "webView" : {