Sort supported args

[IanButterworth]

Adds sorting to this tip because the unsorted options are hard to scan.

[codecov]

Codecov Report

Merging #4156 (82ecb57) into master (0f4a0c7) will not change coverage.
The diff coverage is n/a.

❗ Current head 82ecb57 differs from pull request most recent head 8c9283f. Consider uploading reports for the commit 8c9283f to get more accurate results

@@           Coverage Diff           @@
##           master    #4156   +/-   ##
=======================================
  Coverage   77.46%   77.46%           
=======================================
  Files          28       28           
  Lines        7048     7048           
=======================================
  Hits         5460     5460           
  Misses       1588     1588           

Impacted Files	Coverage Δ
src/args.jl	74.24% <ø> (ø)

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[BeastyBlacksmith]

I think supported_attrs could already return the sorted vector

[t-bltg]

Why merge something which doesn't pass ci ?

[BeastyBlacksmith]

Hmm.. I thought I was fighting the same issue as in the other PRs. Anyway, it's fixed now.