Plans leading to v0.17.0

[mikeingold]

Breaking changes under consideration:

• Remove deprecated integral(f, geometry, ::GaussKronrod()) for geometries with more than one parametric dimension.
• Lift minimum compat for Meshes.jl to v0.52.12
  • Remove conditional version number check in @testitems for Frustum, Pyramid, and Wedge
  • Lift minimum compat for CoordRefSystems.jl to v0.16 for consistency with this min version of Meshes.
• Use of public keyword/macro for exported references?

Can probably still be implemented under v0.16.x:

• Add @test_throws on unsupported Enzyme differentials to monitor for resolution of this upstream issue.
• Implement Base.show methods

[JoshuaLampert]

Sounds good to me.