feat: marko 6 support

[DylanPiercey]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 76.47059% with 8 lines in your changes missing coverage. Please review.

Project coverage is 83.78%. Comparing base (bec6436) to head (7b14437).
Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
src/index-browser.ts	77.77%	6 Missing ⚠️
src/index.ts	71.42%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #25      +/-   ##
==========================================
- Coverage   86.53%   83.78%   -2.76%     
==========================================
  Files           3        3              
  Lines         208      222      +14     
  Branches       57       61       +4     
==========================================
+ Hits          180      186       +6     
- Misses         25       35      +10     
+ Partials        3        1       -2     

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