copy code of conduct from the main CWL repo

[mr-c]

No description provided.

[codecov]

Codecov Report

Merging #1021 into master will decrease coverage by 0.08%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1021      +/-   ##
==========================================
- Coverage    79.4%   79.31%   -0.09%     
==========================================
  Files          30       30              
  Lines        5996     5996              
  Branches     1488     1488              
==========================================
- Hits         4761     4756       -5     
- Misses        864      865       +1     
- Partials      371      375       +4

Impacted Files	Coverage Δ
cwltool/job.py	66.88% <0%> (-0.89%)	⬇️
cwltool/docker.py	54.05% <0%> (-0.46%)	⬇️

---

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[codecov]

Codecov Report

Merging #1021 into master will decrease coverage by 0.08%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1021      +/-   ##
==========================================
- Coverage    79.4%   79.31%   -0.09%     
==========================================
  Files          30       30              
  Lines        5996     5996              
  Branches     1488     1488              
==========================================
- Hits         4761     4756       -5     
- Misses        864      865       +1     
- Partials      371      375       +4

Impacted Files	Coverage Δ
cwltool/job.py	66.88% <0%> (-0.89%)	⬇️
cwltool/docker.py	54.05% <0%> (-0.46%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update ae401a8...cf7c54b. Read the comment docs.