`pipenv graph` no longer shows version info

```sh
pipenv install sampleproject
```
```console
$ pipenv --version
pipenv, version 2024.4.0
$ pipenv graph
sampleproject==4.0.0
└── peppercorn
```
It used to include version info:
``` console
$ /usr/bin/pipenv --version
pipenv, version 2023.12.1
$ /usr/bin/pipenv graph
sampleproject==4.0.0
└── peppercorn [required: Any, installed: 0.6]
```