Add links to pypi and codecov to readme

README.md

@@ -1,5 +1,8 @@
 # astro_metadata_translator
 
+[![pypi](https://img.shields.io/pypi/v/astro-metadata-translator.svg)](https://pypi.org/project/astro-metadata-translator/)
+[![codecov](https://codecov.io/gh/lsst/astro_metadata_translator/branch/main/graph/badge.svg?token=0HtEHdoYDF)](https://codecov.io/gh/lsst/astro_metadata_translator)
+
 Observation metadata handling infrastructure
 
 This package can be used to translate headers from astronomical
@@ -12,5 +15,6 @@ Data Management team.
 
 It does not depend on any LSST software.
 
-Documentation: <https://astro-metadata-translator.lsst.io>
-Source: <https://github.com/lsst/astro_metadata_translator>
+Documentation: <https://astro-metadata-translator.lsst.io>\
+Source: <https://github.com/lsst/astro_metadata_translator>\
+PyPI: <https://pypi.org/project/astro-metadata-translator/>