Future warning pd 2

[znicholls]

Pull request

Please confirm that this pull request has done the following:

• Tests added
• Documentation added (where applicable)
• Example added (either to an existing notebook or as a new notebook, where applicable)
• Description in CHANGELOG.rst added

Adding to CHANGELOG.rst

Please add a single line in the changelog notes similar to one of the following:

- (`#XX <http://link-to-pr.com>`_) Added feature which does something
- (`#XX <http://link-to-pr.com>`_) Fixed bug identified in (`#XX <http://link-to-issue.com>`_)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.30%. Comparing base (b6e9c1a) to head (0f6dbbf).
Report is 21 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #347      +/-   ##
==========================================
+ Coverage   93.25%   93.30%   +0.05%     
==========================================
  Files          20       20              
  Lines        2594     2614      +20     
  Branches      515      544      +29     
==========================================
+ Hits         2419     2439      +20     
  Misses        111      111              
  Partials       64       64              

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