libev_connection: add **kwargs to _handle_event; suppress default_ioloop reuse warning
libev_connection: add **kwargs to _handle_event; suppress default_ioloop reuse warning

renshawbay/pika-python3,Tarsbot/pika,fkarb/pika-python3,knowsis/pika,shinji-s/pika,Zephor5/pika,vitaly-krugl/pika,reddec/pika,vrtsystems/pika,zixiliuyue/pika,skftn/pika,jstnlef/pika,pika/pika,benjamin9999/pika,hugoxia/pika