Fixed misspelled function name.
Fixed misspelled function name.

If I could learn how to type that'd be great...
Tetpay/php-bitpay-client,bitpay/php-bitpay-client,ionux/php-bitpay-client,eXcomm/php-bitpay-client,ionux/php-bitpay-client,samuelbohler/php-bitpay-client,initaldk/php-bitpay-client,eXcomm/php-bitpay-client,Tetpay/php-bitpay-client,initaldk/php-bitpay-client,samuelbohler/php-bitpay-client,bitpay/php-bitpay-client,Tetpay/php-bitpay-client