Allow OneHotArrays.jl v0.2

[mcabbott]

This currently blocks MLUtils v0.3. Not sure if there are reasons to delay.

(jl_uNbWM9) pkg> add MLUtils@0.3
   Resolving package versions...
ERROR: Unsatisfiable requirements detected for package OneHotArrays [0b1bfda6]:
 OneHotArrays [0b1bfda6] log:
 ├─possible versions are: 0.1.0 or uninstalled
 ├─restricted to versions 0.1 by Flux [587475ba], leaving only versions: 0.1.0
 │ └─Flux [587475ba] log:
 │   ├─possible versions are: 0.13.8 or uninstalled
 │   └─Flux [587475ba] is fixed to version 0.13.8
 └─restricted by compatibility requirements with MLUtils [f1d291b0] to versions: uninstalled — no versions left
   └─MLUtils [f1d291b0] log:
     ├─possible versions are: 0.1.0-0.3.0 or uninstalled
     ├─restricted to versions 0.2-0.3 by Flux [587475ba], leaving only versions: 0.2.0-0.3.0
     │ └─Flux [587475ba] log: see above
     └─restricted to versions 0.3 by an explicit requirement, leaving only versions: 0.3.0

Closes #2111

[CarloLucibello]

OneHotArrays.jl still needs the v0.2 tag. If we are not waiting for something else to get into the release we can tag now

[mcabbott]

Oh I see now.

Tagging a OneHotArrays 0.1.1 which allows MLUtils 0.3 might be another option.

[CarloLucibello]

I think we can just tag v0.2, I don't think anyone is planning additional breaking changes. The breaking was in FluxML/OneHotArrays.jl#20, and seems a minor one, the change in the type parameterization.

[mcabbott]

Now fails with:

WARNING: both MLUtils and Base export "rpad"; uses of it in module Flux must be qualified
nested model printing: Error During Test at /home/runner/work/Flux.jl/Flux.jl/test/layers/show.jl:9
  Got exception outside of a @test
  UndefVarError: rpad not defined

Looks like the change is

JuliaML/MLUtils.jl@5a39b1f#diff-5b453f8f7fb34afbebfc6f688a8209aa0532c8b1c3e95393f97afcbc37a473e7L13-R12

which replaces piracy with exporting a new function of the same name, clashing with Base's.

[codecov-commenter]

Codecov Report

Base: 86.90% // Head: 86.90% // No change to project coverage 👍

Coverage data is based on head (34c57d3) compared to base (4662c4c).
Patch has no changes to coverable lines.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2109   +/-   ##
=======================================
  Coverage   86.90%   86.90%           
=======================================
  Files          18       18           
  Lines        1420     1420           
=======================================
  Hits         1234     1234           
  Misses        186      186           

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