feat: trap SIGINT, SIGTERM and SIGHUP for autoclosing

[Mastercuber]

🔗 Linked issue

Closes #107

❓ Type of change

• 📖 Documentation (updates to the documentation, readme, or JSdoc annotations)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality like performance)
• ✨ New feature (a non-breaking change that adds functionality)
• 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

For proper auto-closing when sending signals (SIGINT/SIGTERM/SIGHUP) to the process - e.g. while developing - this PR adds traps for these 3 signals and manually triggers the auto-closing by firing an exit event.

📝 Checklist

• I have linked an issue or discussion.
• I have updated the documentation accordingly.

[codecov]

Codecov Report

Merging #108 (2dc1174) into main (78dd4b7) will increase coverage by 0.11%.
The diff coverage is 100.00%.

❗ Current head 2dc1174 differs from pull request most recent head b871471. Consider uploading reports for the commit b871471 to get more accurate results

@@            Coverage Diff             @@
##             main     #108      +/-   ##
==========================================
+ Coverage   57.90%   58.01%   +0.11%     
==========================================
  Files          12       12              
  Lines        1487     1491       +4     
  Branches      138      138              
==========================================
+ Hits          861      865       +4     
  Misses        626      626              

Files Changed	Coverage Δ
src/listen.ts	82.77% <100.00%> (+0.23%)	⬆️

[pi0]

Thanks for this PR dear @Mastercuber sorry it took long.