telecheck_purchase fails trying to cast an array to a string

[consolibyte]

Error: strtolower() expects parameter 1 to be string, array given

If you call this method:
telecheck_purchase(...)
https://github.com/payeezy/payeezy_direct_API/blob/master/payeezy_php/example/src/Payeezy.php#L851

It tries to cast the array payload you passed in using strtolower() here:
https://github.com/payeezy/payeezy_direct_API/blob/master/payeezy_php/example/src/Payeezy.php#L440

Result is that telecheck_purchase transactions do not work at all.