• Adds support for env, service, version, and tags parameters (#254)
• Replaces previous enableTags with service and env parameters

When the new tagging parameters are set in conjunction with addExtension:true, they are translated to DD_XXX environment variables and when set with addExtension:false, they are set as Lambda resource tags.

No breaking changes are expected, as the env and service parameters continue to default to the stage and service values of the serverless project as enableTags did. However, you are encouraged to set env and service tags explicitly using the new parameters.