fix old version string

build/js/app.js

@@ -76,7 +76,7 @@ browser.webRequest.onHeadersReceived.addListener(
 browser.runtime.onInstalled.addListener(details => {
   let open_settings_page = false;
 
-  if (details.reason == "update" && details.previousVersion == "0.1.0.0") {
+  if (details.reason == "update" && details.previousVersion == "0.0.1.3") {
     open_settings_page = true;
   }