feat: add support for MOJO v4

[P403n1x87]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 87.50000% with 3 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (main@6e75282). Learn more about missing BASE report.
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
austin/format/mojo.py	87.50%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #47   +/-   ##
=======================================
  Coverage        ?   76.64%           
=======================================
  Files           ?       20           
  Lines           ?     1858           
  Branches        ?      230           
=======================================
  Hits            ?     1424           
  Misses          ?      360           
  Partials        ?       74           

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