upgrade to IndirectArrays 1.0; drop support for 0.5

[bjarthur]

supersedes #1553

[codecov-commenter]

Codecov Report

Merging #1554 (ab029dc) into master (423f170) will increase coverage by 0.19%.
The diff coverage is 50.00%.

@@            Coverage Diff             @@
##           master    #1554      +/-   ##
==========================================
+ Coverage   89.68%   89.87%   +0.19%     
==========================================
  Files          39       39              
  Lines        4671     4999     +328     
==========================================
+ Hits         4189     4493     +304     
- Misses        482      506      +24     

Impacted Files	Coverage Δ
src/aesthetics.jl	80.79% <50.00%> (+1.09%)	⬆️
src/poetry.jl	90.32% <0.00%> (-1.21%)	⬇️
src/mapping.jl	86.06% <0.00%> (-1.10%)	⬇️
src/coord.jl	89.91% <0.00%> (-0.47%)	⬇️
src/geom/subplot.jl	94.47% <0.00%> (-0.43%)	⬇️
src/geom/beeswarm.jl	89.77% <0.00%> (-0.36%)	⬇️
src/data.jl	0.00% <0.00%> (ø)
src/shapes.jl	100.00% <0.00%> (ø)
src/geom/line.jl	100.00% <0.00%> (ø)
src/geom/blank.jl	100.00% <0.00%> (ø)
... and 22 more

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