fix: reported codeclimate issues (#349)

* chore: restructuring consumer for a better order

* chore: reducing option dupes

* chore: reducing executeHandler complexity

* chore: moving a few bits around

* chore: reducing heartbeat dup

* chore: removing un required debug

* chore: removing additional if statement

* chore: reducing executeHandler complexity

* Revert "chore: reducing executeHandler complexity"

This reverts commit 9263e69.

* chore: reducing poll complexity

* chore: reducing emitError duplication

* chore: moving eventemitter to types

* chore: formatting

* chore: moving isrunning up one

* chore: removing additional timeout func

* chore: moving handleMessageTimeoutId def

* chore: moving result var down

* chore: formatting