Backport PR #913 on branch 1.x (Fix handling of dev version)

[meeseeksmachine]

Backport PR #913: Fix handling of dev version

[codecov-commenter]

Codecov Report

Merging #914 (4c9a51b) into 1.x (04b197d) will decrease coverage by 0.14%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##              1.x     #914      +/-   ##
==========================================
- Coverage   71.64%   71.50%   -0.15%     
==========================================
  Files          62       62              
  Lines        7686     7686              
  Branches     1275     1272       -3     
==========================================
- Hits         5507     5496      -11     
- Misses       1790     1796       +6     
- Partials      389      394       +5     

Impacted Files	Coverage Δ
jupyter_server/services/kernels/handlers.py	57.80% <0.00%> (-0.85%)	⬇️
jupyter_server/services/contents/filemanager.py	71.40% <0.00%> (-0.80%)	⬇️
jupyter_server/base/zmqhandlers.py	53.43% <0.00%> (-0.53%)	⬇️
jupyter_server/serverapp.py	65.24% <0.00%> (-0.19%)	⬇️
jupyter_server/base/handlers.py	65.33% <0.00%> (ø)

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