Clean up NPM Package Handling

[blink1073]

Better handling of npm workspace packages - pack them all at once and do not print the tags when listing

[codecov-commenter]

Codecov Report

Merging #128 (e1c724e) into master (903fd1e) will decrease coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #128      +/-   ##
==========================================
- Coverage   85.53%   85.52%   -0.02%     
==========================================
  Files          17       17              
  Lines        2102     2093       -9     
  Branches      253      252       -1     
==========================================
- Hits         1798     1790       -8     
+ Misses        213      212       -1     
  Partials       91       91              

Impacted Files	Coverage Δ
jupyter_releaser/npm.py	82.22% <100.00%> (-0.42%)	⬇️

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