Fix #175 by adding find_elements to the list of functions with arguments

lib/Test/Selenium/Remote/Driver.pm

@@ -45,6 +45,7 @@ sub has_args {
     my $fun_name      = shift;
     my $hash_fun_args = {
         'find_element'     => 1,
+        'find_elements'     => 1,
         'compare_elements' => 2,
         'get' => 1,
     };