Update code style badge to Runic

[mtfishman]

Close #91.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 85.00%. Comparing base (0c170c7) to head (2cf34b1).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #92   +/-   ##
=======================================
  Coverage   85.00%   85.00%           
=======================================
  Files           1        1           
  Lines          80       80           
=======================================
  Hits           68       68           
  Misses         12       12           

Flag	Coverage Δ
docs	69.33% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.