Update Documenter to 1.3

[goerz]

This enables the automatic writing of an objects.inv inventory file (and also gives the documentation a slightly nicer UI).

I'd like to be able to use DocumenterInterLinks to link from my project to the documentation of CompomentArrays, and this update would make that easier. See also SciML/RecursiveArrayTools.jl#364, although here you were still using a pinned pre-1.0 version of Documenter. (Actually, so old that even DocumenterInventoryWritingBackport doesn't support it anymore.) I tried building locally, and everything seems to work fine with Documenter 1.3.

I didn't touch the CI still using Julia 1.6, although using a more recent version of Julia would probably be a good idea.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 74.09%. Comparing base (44a9d4c) to head (d76d832).

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Additional details and impacted files

@@           Coverage Diff           @@
##             main     #253   +/-   ##
=======================================
  Coverage   74.09%   74.09%           
=======================================
  Files          25       25           
  Lines         772      772           
=======================================
  Hits          572      572           
  Misses        200      200           

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[jonniedie]

Looks good to me, thanks!