v0.2.3

Make state/transmit configurable + polling state (#124)

* standardize rpc commitment + move preflight check to parameter

* add SkipPreflight to spec

* make commitment level configurable

* fix relay test cases

* update monitoring with fetching state changes

* update e2e test with state fetching change

* preliminary polling - need test case, polling configurability

* polling test case

* add state polling to start up

* remove blocking calls on state fetching

* lint fixes

* use utils.StartStopOnce

* fix lint: pass lock by value

* use ContextFromChanWithDeadline

* initial race condition fixes

* add parameters to relay config

* update libocr to 5d2b1d5f424ba9183c4240ed4a6062141c82c7b5

* add RWMutex to prevent race conditions

* fix rebase damage

* include preliminary state timeout error

* make stale timeout configurable, default to skip preflight

* go fmt

* add new params to simple job spec

* fix commitment typo

* feedback fixes: fix comment, block close until loop exits, etc

* add polling jitter