Release 0.12.0

[johannfaouzi]

This PR is the last one before the release of version 0.12.0:

• The version number is updated.
• The Reproducibility page is updated.

[codecov]

Codecov Report

Merging #118 (9c89a04) into main (16e1703) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #118   +/-   ##
=======================================
  Coverage   99.07%   99.07%           
=======================================
  Files          97       97           
  Lines        5699     5699           
=======================================
  Hits         5646     5646           
  Misses         53       53           

Impacted Files	Coverage Δ
pyts/__init__.py	100.00% <100.00%> (ø)

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