Added stubs file for better IDE support

Author: rossjcooper

.stubs.php

@@ -0,0 +1,13 @@
+<?php
+
+namespace Laravel\Dusk {
+
+    use Imagick;
+
+    class Browser {
+        public function assertScreenshot(string $name, float $threshold = 0.0001, int $metric = Imagick::METRIC_MEANSQUAREERROR): static {}
+
+        public function assertResponsiveScreenshots(string $name, float $threshold = 0.0001, int $metric = Imagick::METRIC_MEANSQUAREERROR): static {}
+
+    }
+}