fix!: Update content and unlisted script globalName default to false

[aklinker1]

Warning

BREAKING CHANGE: If your script needs to return a value, like for browser.scripting.executeScript, set globalName: true to maintain the old behavior.

Overview

Don't generate IIFE global variable for content and unlisted scripts by default. This prevents generating extra code when a return value isn't necessary.

This closes #2156

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.36%. Comparing base (0263c77) to head (9ab474b).

Additional details and impacted files

@@            Coverage Diff             @@
##            major    #2511      +/-   ##
==========================================
+ Coverage   79.31%   79.36%   +0.05%     
==========================================
  Files         131      131              
  Lines        3969     3969              
  Branches      905      905              
==========================================
+ Hits         3148     3150       +2     
+ Misses        730      728       -2     
  Partials       91       91              

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