Updated README with PyPi version reference

Author: joergschultzelutter

README.md

@@ -1,5 +1,5 @@
 # robotframework-aprslib
-[![License: GPL v3](https://img.shields.io/badge/License-GPLv3-blue.svg)](https://www.gnu.org/licenses/gpl-3.0) [![Code style: black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black) [![CodeQL](https://github.com/joergschultzelutter/robotframework-aprslib/actions/workflows/codeql.yml/badge.svg)](https://github.com/joergschultzelutter/robotframework-aprslib/actions/workflows/codeql.yml)
+[![License: GPL v3](https://img.shields.io/badge/License-GPLv3-blue.svg)](https://www.gnu.org/licenses/gpl-3.0) [![Code style: black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black) [![CodeQL](https://github.com/joergschultzelutter/robotframework-aprslib/actions/workflows/codeql.yml/badge.svg)](https://github.com/joergschultzelutter/robotframework-aprslib/actions/workflows/codeql.yml) [![PyPi version](https://img.shields.io/pypi/v/robotframework-aprslib.svg)](https://pypi.python.org/pypi/robotframework-aprslib)
 
 ```robotframework-aprslib``` is a [Robot Framework](https://www.robotframework.org) keyword collection for the [aprslib](https://github.com/rossengeorgiev/aprs-python) Python library. It allows __licensed ham radio operators__ to establish a connection to the APRS-IS servers and send/receive/decode APRS requests.