v3.0.0

This is a major rewrite of the function that contains a lot of breaking changes:

• We are using null values to avoid having multiple conditional versions of the lambda resource. This means that if you were deploying in a VPC, or using an S3 bucket, or both, terraform will want to destroy your old Lambda function and recreate it. You can avoid this by manually moving the state - see terraform state mv documentation.
• The IAM role created should now get the same tags as the other resources.
• source_code_hash and s3_object_version are now passed verbatim to the Lambda.

Please see the updated examples/ for current usage. We have also added a basic test suite that can be run with task e2e (requires valid AWS credentials).