Changelog fix

[mdeceglie]

• Code changes are covered by tests
• Code changes have been evaluated for compatibility/integration with TrendAnalysis
• New functions added to __init__.py
• API.rst is up to date, along with other sphinx docs pages
• Example notebooks are rerun and differences in results scrutinized
• Updated changelog

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.19%. Comparing base (d8d0741) to head (34026ff).

Additional details and impacted files

@@               Coverage Diff               @@
##           development     #446      +/-   ##
===============================================
+ Coverage        96.10%   96.19%   +0.09%     
===============================================
  Files               11       11              
  Lines             2209     2209              
===============================================
+ Hits              2123     2125       +2     
+ Misses              86       84       -2     

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