Adds Dominik Fässler to AUTHORS
Adds Dominik Fässler to AUTHORS

dims/py-amqp,dallasmarlow/py-amqp,dims/py-amqp,yetone/py-amqp,jonahbull/py-amqp,dallasmarlow/py-amqp,yetone/py-amqp,smurfix/aio-py-amqp,jonahbull/py-amqp,smurfix/aio-py-amqp