Changes

1.2.0

Maintenance/modernization release (fork).

• Compatibility with modern JDKs. Hinted the toArray(T[]) method so the type compiles on JDK 11 and later; it had been broken since Java 11 added Collection.toArray(IntFunction), which made the single-argument toArray overload ambiguous.
• Correct java.util.Set hash code. hashCode now returns the sum of the members' hash codes, as the Set contract requires, so a HierSet and an equal java.util.HashSet hash identically. It previously used Clojure's collection hash, breaking the contract.
• Target Clojure 1.12.5; replaced the EOL 1.4/1.5/1.6 test profiles with 1.10.3 / 1.11.4 / 1.12.5.
• Added GitHub Actions CI: JDK 8/11/17/21 × Clojure 1.10.3/1.11.4/1.12.5.
• Removed the unused ILookup import.
• Expanded the test suite from 30 to 61 assertions (comparator, metadata, java.util.Set and Sorted interop, not-found semantics, immutability).
• Added :min-lein-version and :pedantic? :warn.

1.1.2

• Fixed a bad pom.xml.

1.1.1

• Fixed an infinite-recursion bug in HierSet's equals method.

1.1.0

• Implemented the persistent/java.util.Set interfaces; added conj/disj support and tests.

1.0.0

• Initial release.