REL: update version to 1.7.1 in configuration files.

[phmbressan]

Pull request type

• Other (please describe): Release PR

Checklist

• Docs have been reviewed and added / updated
• Lint (black rocketpy/ tests/) has passed locally
• All tests (pytest tests -m slow --runslow) have passed locally
• CHANGELOG.md has been updated (if relevant)

Breaking change

• No

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 76.43%. Comparing base (ed2a6a2) to head (67af56c).
Report is 3 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #750   +/-   ##
=======================================
  Coverage   76.43%   76.43%           
=======================================
  Files          95       95           
  Lines       11078    11078           
=======================================
  Hits         8468     8468           
  Misses       2610     2610           

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