Bump dependencies, adjust to changes

[fingolfin]

Closes #2886

[thofma]

Lots of #2876, but also some doctests need to be updated.

[fingolfin]

I'll take a look. Odd about the doctests, as I did run Oscar.build_doc(; doctest=:fix). Ah well.

[fingolfin]

Had to cherry pick PR #2886 by @felix-roehrich to fix a deprecation warning

[codecov]

Codecov Report

Merging #2903 (880ec5e) into master (c40aeac) will decrease coverage by 0.01%.
Report is 4 commits behind head on master.
The diff coverage is 63.49%.

@@            Coverage Diff             @@
##           master    #2903      +/-   ##
==========================================
- Coverage   80.23%   80.23%   -0.01%     
==========================================
  Files         462      462              
  Lines       65457    65458       +1     
==========================================
- Hits        52522    52521       -1     
- Misses      12935    12937       +2     

Files	Coverage Δ
experimental/LinearQuotients/src/cox_rings.jl	89.37% <100.00%> (ø)
experimental/PlaneCurve/src/ParaPlaneCurves.jl	97.77% <100.00%> (ø)
experimental/Schemes/FunctionFields.jl	82.75% <ø> (-0.07%)	⬇️
...erimental/Schemes/MorphismFromRationalFunctions.jl	40.77% <100.00%> (ø)
.../ToricVarieties/NormalToricVarieties/attributes.jl	98.63% <ø> (ø)
...ometry/ToricVarieties/ToricMorphisms/attributes.jl	78.57% <ø> (ø)
...etry/ToricVarieties/ToricMorphisms/constructors.jl	67.85% <ø> (ø)
src/Groups/homomorphisms.jl	93.21% <ø> (-0.13%)	⬇️
src/Modules/UngradedModules.jl	83.29% <100.00%> (+0.02%)	⬆️
src/Modules/hilbert.jl	80.30% <100.00%> (ø)
... and 17 more

... and 4 files with indirect coverage changes