FIx #21: run afterconsume when there is no new messages

Fix: WithLogger doesn't work when cause consume error

support custom prefix

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disable some tests

bugfix: NackRedeliveryDelay may cause unexpected retry

add more tests

try to intercept messages

fix test suite

support NackRedeliveryDelay

let consume buffer naturally depletion

support custom logger

preload scripts and use evalsha to call them

fix test suite