Update class-wc-integration-fb-conversion-pixel.php

Added https to Facebook Pixel js request per current Facebook standard to avoid additional redirect from http.

inc/class-wc-integration-fb-conversion-pixel.php

@@ -111,7 +111,7 @@ public function fb_tracking_pixel() {
 n.callMethod.apply(n,arguments):n.queue.push(arguments)};if(!f._fbq)f._fbq=n;
 n.push=n;n.loaded=!0;n.version='2.0';n.queue=[];t=b.createElement(e);t.async=!0;
 t.src=v;s=b.getElementsByTagName(e)[0];s.parentNode.insertBefore(t,s)}(window,
-document,'script','//connect.facebook.net/en_US/fbevents.js');
+document,'script','https://connect.facebook.net/en_US/fbevents.js');
 
 fbq('init', '<?php echo esc_html( $this->fbid ); ?>');
 fbq('track', 'PageView');