release v1.4.0

Release

v1.4.0

checklist

• Create Release Issue
• Create merge request: branch release_vX.Y.Z into master
• Merge develop into release_vX.Y.Z
• Checkout release_vX.Y.Z
• Adjust changelog.md (see template for changelog)
• Update version number in mlair/__ init__.py
• Create new dist file: python3 setup.py sdist bdist_wheel
• Update file link distribution file (current version) in README.md
• Update file link in docs/_source/installation.rst
• Commit + push
• Merge release_vX.Y.Z into master
• Create new tag with
  • distribution file (.whl)
  • link to Documentation
  • Example Jupyter Notebook
  • changelog

template for changelog

## vX.Y.Z -  yyyy-mm-dd  - <release description>

### general:
* text
### new features:
* words (issue)
### technical:
*