fix: Restore previous behavior of SdkConfiguration::setScope() being nullable

[evansims]

Changes

This PR restores previous behavior that allowed SdkConfiguration::setScope() to accept null values. In previous versions, setScope() allowed null | string[]. This was inadvertently changed to only accept string[] in the previous release.

This was mistakenly altered during the migration from the previous magic method approach of offering virtual methods for altering configurations, to the PHP 8.0+ syntax and offering concrete methods.

References

Resolves #664

Testing

Run /vendor/bin/pest from a local cloned repo, or review the GitHub status checks below.

Contributor Checklist

• I have read the Auth0 general contribution guidelines
• I have read the Auth0 code of conduct

[codecov-commenter]

Codecov Report

Base: 94.35% // Head: 94.35% // No change to project coverage 👍

Coverage data is based on head (4704137) compared to base (d2d8946).
Patch coverage: 80.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff            @@
##               main     #665   +/-   ##
=========================================
  Coverage     94.35%   94.35%           
- Complexity     1275     1277    +2     
=========================================
  Files            65       65           
  Lines          4231     4231           
=========================================
  Hits           3992     3992           
  Misses          239      239           

Impacted Files	Coverage Δ
src/Configuration/SdkConfiguration.php	71.48% <80.00%> (ø)

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