cwltool.Dockerfile: only install one version of pyparsing

[mr-c]

No description provided.

[codecov]

Codecov Report

Merging #1562 (d9e9ef6) into main (3af90d0) will increase coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #1562      +/-   ##
==========================================
+ Coverage   65.97%   65.98%   +0.01%     
==========================================
  Files          91       91              
  Lines       16283    16283              
  Branches     4218     4218              
==========================================
+ Hits        10743    10745       +2     
+ Misses       4391     4389       -2     
  Partials     1149     1149              

Impacted Files	Coverage Δ
cwltool/job.py	76.92% <0.00%> (-0.41%)	⬇️
job.py	62.47% <0.00%> (+0.81%)	⬆️

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