fix: support all import / export statements and remove .js extensions

[stropitek]

• feat: handle import star syntax
• tests: add more test cases
• tests: add more test cases and update readme
• fix: remove .js extension from dependencies

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.36%. Comparing base (c9f0d1a) to head (cffe7a7).

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #11      +/-   ##
==========================================
+ Coverage   98.16%   98.36%   +0.19%     
==========================================
  Files           1        1              
  Lines         109      122      +13     
  Branches       37       40       +3     
==========================================
+ Hits          107      120      +13     
  Misses          2        2              

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