docs(readme): using test.pypi.org links

README.rst

@@ -28,27 +28,27 @@ Yet another Python library with helpers and utilities for data analysis and proc
     :alt: Coverage report
 
 .. |version| image:: https://img.shields.io/pypi/v/jupyter-analysis-tools.svg
-    :target: https://pypi.org/project/jupyter-analysis-tools
+    :target: https://test.pypi.org/project/jupyter-analysis-tools
     :alt: PyPI Package latest release
 
 .. |license| image:: https://img.shields.io/pypi/l/jupyter-analysis-tools.svg
     :target: https://en.wikipedia.org/wiki/MIT_License
     :alt: License
 
 .. |wheel| image:: https://img.shields.io/pypi/wheel/jupyter-analysis-tools.svg
-    :target: https://pypi.org/project/jupyter-analysis-tools#files
+    :target: https://test.pypi.org/project/jupyter-analysis-tools#files
     :alt: PyPI Wheel
 
 .. |supported-versions| image:: https://img.shields.io/pypi/pyversions/jupyter-analysis-tools.svg
-    :target: https://pypi.org/project/jupyter-analysis-tools
+    :target: https://test.pypi.org/project/jupyter-analysis-tools
     :alt: Supported versions
 
 .. |commits-since| image:: https://img.shields.io/github/commits-since/BAMresearch/jupyter-analysis-tools/v0.1.2.svg
     :target: https://github.com/BAMresearch/jupyter-analysis-tools/compare/v0.1.2...main
     :alt: Commits since latest release
 
 .. |downloads| image:: https://img.shields.io/pypi/dw/jupyter-analysis-tools.svg
-    :target: https://pypi.org/project/jupyter-analysis-tools/
+    :target: https://test.pypi.org/project/jupyter-analysis-tools/
     :alt: Weekly PyPI downloads
 
 .. end-badges