Making changes to make sdk sel 3 compatible (#232)

* Making changes to make sdk sel 3 compatible

* Making changes more simpler

Author: Amit3200

src/main/java/io/percy/selenium/Percy.java

@@ -198,7 +198,7 @@ public void screenshot(String name, Map<String, Object> options) throws Unsuppor
         CommandExecutor executor = ((RemoteWebDriver) driver).getCommandExecutor();
 
         // Get HttpCommandExecutor From TracedCommandExecutor
-        if (executor instanceof TracedCommandExecutor) {
+        if (executor.getClass().toString().contains("TracedCommandExecutor")) {
             Class className = executor.getClass();
             try {
                 Field field = className.getDeclaredField("delegate");