test chaintransform on Zygote again

[st--]

See #415

[codecov[bot]]

Codecov Report

Patch coverage has no change and project coverage change: -3.75 :warning:

Comparison is base (ef6d459) 94.16% compared to head (ec977a6) 90.41%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #424      +/-   ##
==========================================
- Coverage   94.16%   90.41%   -3.75%     
==========================================
  Files          52       52              
  Lines        1387     1387              
==========================================
- Hits         1306     1254      -52     
- Misses         81      133      +52     

see 8 files with indirect coverage changes

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