Restore print outputs in process

[blink1073]

Fixes #356

[codecov-commenter]

Codecov Report

Base: 80.89% // Head: 80.89% // No change to project coverage 👍

Coverage data is based on head (fed8754) compared to base (9d11279).
Patch coverage: 50.00% of modified lines in pull request are covered.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #357   +/-   ##
=======================================
  Coverage   80.89%   80.89%           
=======================================
  Files          22       22           
  Lines        1701     1701           
  Branches      323      323           
=======================================
  Hits         1376     1376           
  Misses        225      225           
  Partials      100      100           

Impacted Files	Coverage Δ
jupyterlab_server/process.py	67.51% <50.00%> (ø)

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[krassowski]

Thank you!