Update to 1.002001

Upstream changes:
1.2.1    2024-01-21
    BUG FIXES:
        - Ensure that core boolean support doesn't fail on perls
          older than 5.36 (Paul Evans)

1.2.0  2024-01-21
    NEW FEATURES:
        - support the core boolean type (true/false) in perl >= 5.36.0
    OTHER:
        - doc fixes and improvements (Florian Schlichting, Andre Klarner)

(wen)