Mock Lambda Locally

[dehli]

BEFORE SUBMITTING AN ISSUE CHECK THE FOLLOWING:

• I checked existing issues.
• This is not a support question (which can be answered on Slack).
• This issue is for Lambda (not the Web Client, API, or Bots)

FEATURE REQUEST

- Describe the feature you would like to see
Ability to locally test and run Lambda code.

- Why you need it
Currently we need to deploy to Lambda to test.

- How it should work
You should be able to run Wombat code in multiple languages by hitting a local server wombats-lambda running locally. Note that this is different from the other wombats-api lambda mock ticket (which is specific to just running Clojure within the api).