Improved Pharo 9 compatibility

[mtabacman]

No description provided.

[codecov]

Codecov Report

Merging #8 (1995360) into release-candidate (4fb05b6) will not change coverage.
The diff coverage is n/a.

@@                 Coverage Diff                 @@
##           release-candidate        #8   +/-   ##
===================================================
  Coverage             100.00%   100.00%           
===================================================
  Files                      5         5           
  Lines                    882       882           
===================================================
  Hits                     882       882           

Impacted Files	Coverage Δ
source/Willow-Auth0-Tests/WillowAuth0Demo.class.st	100.00% <ø> (ø)

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