Upgrade electron

render/index.js

@@ -44,7 +44,10 @@ function createWindow() {
   var win = new BrowserWindow({
     show: false,
     width: 8000,
-    height: 8000
+    height: 8000,
+    webPreferences: {
+      nodeIntegration: true
+    }
   });
 
   // Load index.html 

render/src/js/app.js

@@ -116,14 +116,18 @@ function capture(frameIndex, callback) {
 
   stepsCounter = (stepsCounter + 1) % step;
 
-  capturePage(captureRect, function(img) {
-
+  capturePage(captureRect).then((img) => {
+  
     var outputPath = path.join(renderDir, frameIndex + '.png');
-
+  
     fs.writeFileSync(outputPath, img.toPNG());
     ipcRenderer.send('captured', frameIndex);
     callback();
-
+  
+  }).catch((err) => {
+  
+    throw new err;    
+  
   });
 
 }