Gulp serve or electron restart do not maximize window

[niwasmala]

In the browser process's main.js, i have

const client = require("electron-connect").client;

//snip
mainWindow = new BrowserWindow({width: 400, height: 600});
mainWindow.maximizable();

client.create(mainWindow);

Similar to issue #30, after running "gulp serve" or on electron.restart(), I would expect to see the displayed window to have maximized, but it is not. However, when I run "electron .", the window maximized.