feat: Use current script URL as base if not configured

[cziegeler]

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Related Issues

201

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[github-actions[bot]]

This PR will trigger no release when merged.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 100.00%. Comparing base (d5d7a35) to head (26cae97). Report is 11 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #202 +/- ## ========================================= Coverage 100.00% 100.00% ========================================= Files 2 2 Lines 178 178 ========================================= Hits 178 178 ```

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[cziegeler]

@chicharr I removed the use of optional chaining

[adobe-bot]

:tada: This PR is included in version 2.4.0 :tada:

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• npm package (@latest dist-tag)
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