fix(test): setup

[Mastercuber]

🔗 Linked issue

❓ 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

This changes are not necessary, but maybe helpful for understanding of TLS certification and later testing. Also a fix is included (missing await).

The ca certificate and key are also written to test/.tmp/certs/ and a certificate chain file (test/.tmp/certs/cert.chain.pem) is created.

📝 Checklist

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

[codecov]

Codecov Report

Merging #103 (9d4abd1) into main (bd2b5d6) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #103   +/-   ##
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  Coverage   49.93%   49.93%           
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  Files          10       10           
  Lines        1568     1568           
  Branches      108      108           
=======================================
  Hits          783      783           
  Misses        785      785