fix(requirements): unlock wrapt version (epsagon#213)

* fix(requirements): unlock wrapt version

* Update requirements.txt

feat(main): run epsagon using env var (epsagon#208)

fix(aws_lambda): add propagation flag (epsagon#211)

fix(build): fix deployment script (epsagon#209)

feat(celery.py): add support for celery (epsagon#207)

feat(stepfunctions): Improve aws stepfunctions support (epsagon#202)

feat(stepfunctions): add support to sendTaskSuccess, SendTaskHeartbeat, DescribeExecution, SQS lambda trigger

fix(trace): add epsagon id when propagate feature is on (epsagon#206)

feat(trace): support multi value labels (epsagon#205)

fix(urllib): remove http trace id if its none

feat(urllib): connect elastic load balancer calls (epsagon#203)