* Update sdk_config.ini log.LogLevel comments [#983](https://github.com/paypal/PayPal-PHP-SDK/pull/983). * Update RefundCapture.php [#998](https://github.com/paypal/PayPal-PHP-SDK/pull/998). * update readme for direct credit card restriction [#1019](https://github.com/paypal/PayPal-PHP-SDK/pull/1019). * Add PHP 7.1 and 7.2 in travis build [#1061](https://github.com/paypal/PayPal-PHP-SDK/pull/1061). * Custom cache directory line was not written [#1062](https://github.com/paypal/PayPal-PHP-SDK/pull/1062). * Re-Order the array keys so that JSON will be an array, not an object [#1034](https://github.com/paypal/PayPal-PHP-SDK/pull/1034). * Refactoring tests [#1011](https://github.com/paypal/PayPal-PHP-SDK/pull/1011). * Added condition to ignore extra header [#1060](https://github.com/paypal/PayPal-PHP-SDK/pull/1060). * Fix links to Developer API Reference [#1095](https://github.com/paypal/PayPal-PHP-SDK/pull/1095). * adding target subject to the generate access token call.
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