Release v5.6.0

[jacquelynsmale]

Description of this release

Developer checklist

• [X] Assigned a reviewer

• [X] Indicated the level of changes to this package by affixing one of these labels:

  • major -- Major changes to the API that may break current workflows
  • minor -- Minor changes to the API that do not break current workflows
  • patch -- Patches and bugfixes for the current version that do not break current workflows
  • bumpless -- Changes to documentation, CI/CD pipelines, etc. that don't affect the software's version

• [ ] (If applicable) Updated the dependencies and indicated any downstream changes that are required

• [X] Updated CHANGELOG.md

• [X] Added/updated documentation for these changes

• [X] Added/updated tests for these changes

[jtherrmann]

I've confirmed that trufflehog is just complaining about the storymap URLs, e.g. https://storymaps.arcgis.com/stories/485916be1b1d46889aa436794b5633cb, so we can ignore that failing check.