Update README.md and changelog for 0.4.2 maintenance release (#944)

- 🩹🚧 Backport of bugfix 🩹 Bugfix Use normalized initial_concentrations in result creation for decay megacomplex #927 
- 📚 Updated Readme (PyPI badge link, Discord URL, DOI)
- 📚 Updated Changelog to reflect changes
- Follow up on: 🚀🩹 v0.4.2 release preparation and bugfix backport for result consistency checking purposes #935).

README.md

@@ -2,13 +2,15 @@
 
 pyglotaran is a Python library for Global and Target Analysis
 
-[![latest release](https://pypip.in/version/pyglotaran/badge.svg)](https://pypi.org/project/pyglotaran/)
+[![PyPI version](https://badge.fury.io/py/pyglotaran.svg)](https://badge.fury.io/py/pyglotaran)
 [![Conda Version](https://img.shields.io/conda/vn/conda-forge/pyglotaran.svg)](https://anaconda.org/conda-forge/pyglotaran)
 ![Tests](https://github.com/glotaran/pyglotaran/workflows/Tests/badge.svg)
 [![Documentation Status](https://readthedocs.org/projects/pyglotaran/badge/?version=latest)](https://pyglotaran.readthedocs.io/en/latest/?badge=latest)
 [![Binder](https://static.mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/glotaran/pyglotaran.git/main?urlpath=lab%2Ftree%2Fdocs%2Fsource%2Fnotebooks)
 [![Coverage Status](https://codecov.io/gh/glotaran/pyglotaran/branch/master/graph/badge.svg)](https://codecov.io/gh/glotaran/pyglotaran)
 [![Total alerts](https://img.shields.io/lgtm/alerts/g/glotaran/pyglotaran.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/glotaran/pyglotaran/alerts/)
+[![Discord](https://img.shields.io/discord/883443835135475753.svg?label=&logo=discord&logoColor=ffffff&color=7389D8&labelColor=6A7EC2)](https://discord.gg/KfnEYRSTJx)
+[![DOI](https://zenodo.org/badge/DOI/10.5281/zenodo.5596073.svg)](https://doi.org/10.5281/zenodo.5596073)
 
 **Warning**: This is an _early access_ release, please refer to the [usage notice](#usage-notice) down below prior to committing to use pyglotaran to avoid surprises down the line.
 
@@ -71,9 +73,12 @@ Eventually, and hopefully sooner than later, a (scientific) publication about th
 
 Until then, enjoy your glimpse into the future.
 
-## Mailing List
+## Community Support
 
-[mailing-list](https://groups.google.com/forum/#!forum/glotaran)
+For questions / suggestion please reach out to us via:
+1. [GitHub issues](https://github.com/glotaran/pyglotaran/issues)
+2. [Discord](https://discord.gg/KfnEYRSTJx)
+3. [Google-Groups mailing list](https://groups.google.com/forum/#!forum/glotaran)
 
 ## Credits
 

changelog.md

@@ -1,6 +1,6 @@
 # Changelog
 
-## 0.4.2 (2021-12-12)
+## 0.4.2 (2021-12-31)
 
 ### 🩹 Bug fixes