pipenv fully supported!

Author: dschep

README.md

@@ -34,11 +34,10 @@ custom:
 ```
 This must be the full image name and tag to use, including the runtime specific tag if applicable.
 
-## Experimental Pipenv support :sparkles::cake::sparkles:
+## Pipenv support :sparkles::cake::sparkles:
 If you include a `Pipfile` and have `pipenv` installed instead of a
-`requirements.txt` this will use `pipenv` to install your requirements and link
-them. It doesn't currently work with either the `zip` or `dockerizePip`
-options.
+`requirements.txt` this will use `pipenv lock --r` to generate
+them. It is fully compatible with all options such as `zip` and `dockerizePip`.
 
 
 ## Dealing with Lambda's size limitations