js: increase default startup timeout

--

* src/index.js: change the init default if none is given, so that all
  initialization defaults line up to 1000 miliseconds

lang/js/src/index.js

@@ -38,7 +38,7 @@ import { Connection } from './Connection';
  * @returns {Promise<GpgME>}
  * @async
  */
-function init ({ timeout = 500 } = {}){
+function init ({ timeout = 1000 } = {}){
     return new Promise(function (resolve, reject){
         const connection = new Connection;
         connection.checkConnection(false, timeout).then(