Replace unmaintained gopkg.in/yaml.v3 with go.yaml.in/yaml/v3

[SaschaSchwarze0]

Fixes #381

This replaces the unmaintained gopkg.in/yaml.v3 library with its maintained fork go.yaml.in/yaml/v3 from https://github.com/yaml/go-yaml/tree/v3/.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 73.97%. Comparing base (9b6fad7) to head (50263f7).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #397   +/-   ##
=======================================
  Coverage   73.97%   73.97%           
=======================================
  Files          20       20           
  Lines        1675     1675           
=======================================
  Hits         1239     1239           
  Misses        374      374           
  Partials       62       62           

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[nicksnyder]

Thank you!