Can we downgrade MeshCat?

[adrienbanse]

@blegat @JulienCalbert (idk who worked on this), is there a reason for the compat MeshCat = "0.15, 0.16"? I believe it was added by the CompatHelper.

Our master's student Simon needs to add ModelingToolkit in Dionysos and it conflicts with new versions of MeshCat

All tests pass with 0.14 version

cc @DeligneS

[blegat]

It seems to me that the compat can be removed. It's not used by Dionysos itself but only by one of its examples. Removing it from the Project.toml can be a good PR for @DeligneS ;)

[adrienbanse]

#350