Prepare 1.9.0 release

[0xnm]

What does this PR do?

This PR prepares release 1.9.0.

Review checklist (to be filled by reviewers)

• [ ] Feature or bugfix MUST have appropriate tests (unit, integration, e2e)
• [ ] Make sure you discussed the feature or bugfix with the maintaining team in an Issue
• [ ] Make sure each commit and the PR mention the Issue number (cf the CONTRIBUTING doc)

[codecov-commenter]

Codecov Report

Merging #169 (37270b1) into release/1.9.0 (301bfee) will decrease coverage by 0.17%. The diff coverage is n/a.

@@                 Coverage Diff                 @@
##             release/1.9.0     #169      +/-   ##
===================================================
- Coverage            86.63%   86.46%   -0.17%     
+ Complexity             177      176       -1     
===================================================
  Files                   21       21              
  Lines                  576      576              
  Branches                72       72              
===================================================
- Hits                   499      498       -1     
  Misses                  49       49              
- Partials                28       29       +1     

see 1 file with indirect coverage changes