Allow more SQS settings to be set by env var (#20)

* Allow more SQS settings to be set by env var

* Move sqs config under main config type

* Add yaml tags

Merge pull request #19 from mlarraz/session

Stop using deprecated aws function

add a release workflow to publish to Github packages (#16)

- update Dockerfile build steps
- add a new github action to deploy pacakge

Merge pull request #12 from packrat386/prep_for_1.5.0

Update README and version to prepare for v1.5.0

Parse message bodies with complex types (#4)

We assumed initially that every field in an SNS message would be a
string. However some of them can be complex objects. We can avoid
having to figure that out by just parsing them all to json.RawMessage
and then parsing the only two fields we actually need to strings.

Initial Open Source Commit

This existed as an internal project before, but the history contained
access keys and the like. Currently at 1.3