More Changes Needed to Support Lumino

[jtpio]

• Do not require packages to be importable by node (they might contain DOM code or be style-only). Instead, if a "main" attribute exists, make sure the file is available in the dist
• Normalize handling of workspaces using a helper function

[codecov-commenter]

Codecov Report

Merging #29 (c7da61c) into master (5b17742) will decrease coverage by 0.52%.
The diff coverage is 83.78%.

@@            Coverage Diff             @@
##           master      #29      +/-   ##
==========================================
- Coverage   89.03%   88.51%   -0.53%     
==========================================
  Files          15       15              
  Lines        1697     1715      +18     
  Branches      198      205       +7     
==========================================
+ Hits         1511     1518       +7     
- Misses        118      122       +4     
- Partials       68       75       +7     

Impacted Files	Coverage Δ
jupyter_releaser/tests/test_cli.py	97.83% <ø> (ø)
jupyter_releaser/tests/test_functions.py	100.00% <ø> (ø)
jupyter_releaser/changelog.py	88.18% <62.50%> (-2.56%)	⬇️
jupyter_releaser/npm.py	80.62% <70.00%> (-3.12%)	⬇️
jupyter_releaser/lib.py	76.36% <80.00%> (-1.39%)	⬇️
jupyter_releaser/__init__.py	100.00% <100.00%> (ø)
jupyter_releaser/cli.py	92.27% <100.00%> (+0.03%)	⬆️
jupyter_releaser/python.py	91.66% <100.00%> (+3.78%)	⬆️
jupyter_releaser/tests/conftest.py	98.50% <100.00%> (+0.01%)	⬆️

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[blink1073]

Thanks!