new files

• src/algorithms/matching.js (coverage 96.21%)
  • jsnx.maxWeightMatching
  • jsnx.maximalMatching
• src/algorithms/tests/matching-test.js

modified files

• package.json
  • corrected a typo in script/cover (nom -> npm)
• src/_internals/Set.js
  • added an update method to the set class (like Python's set() update), union for sets rewritten to use this new method
• src/algorithms/index.js
  • added exports for new matching algorithms

Thanks for that! I will have a closer look and answer your questions on the weekend. I just don't find the time during the week.

Got time to merge this?