I'm using a ATTiny817 Seesaw in an application where I need the main code to execute as fast as possible. When sending PWM commands to the Seesaw, the current analog_write method has a blocking time.sleep(0.001) that would introduce an unwanted delay in the loop. I propose to add an argument that would allow the user to modify this as necessary for their code.

This has been tested with a ESP32-S3-DevKitC-1-N8R8 successfully using a delay of 0 and only calling analog_write at random intervals ranging from 50 to 100 milliseconds.

I feel this is consistent with #90 that similarly allowed for users to decrease the delay on analog_read commands. The default behavior of this change still implements a one millisecond delay, so it should have no effect on existing code that uses this library.