What's Changed
* fix: make tests passing again by chrispap95 in https://github.com/scikit-hep/fastjet/pull/269
* ci: Bump pre-commit/action from 3.0.0 to 3.0.1 by dependabot in https://github.com/scikit-hep/fastjet/pull/267
* ci(pre-commit): pre-commit autoupdate by pre-commit-ci in https://github.com/scikit-hep/fastjet/pull/261
* ci: Bump actions/upload-artifact from 3 to 4 by dependabot in https://github.com/scikit-hep/fastjet/pull/264
* ci: Bump actions/download-artifact from 3 to 4 by dependabot in https://github.com/scikit-hep/fastjet/pull/263
* ci: Bump actions/setup-python from 4 to 5 by dependabot in https://github.com/scikit-hep/fastjet/pull/262
* ci: Group dependabot updates by matthewfeickert in https://github.com/scikit-hep/fastjet/pull/272
* ci: fix failing tests after update to upload-artifact v4 by chrispap95 in https://github.com/scikit-hep/fastjet/pull/273
* fix: Add patch to add .Makefile.inc to fastjet-contrib by matthewfeickert in https://github.com/scikit-hep/fastjet/pull/275
* chore: Bump FastJet to v3.4.2 and pybind11 to v2.11.1 by chrispap95 in https://github.com/scikit-hep/fastjet/pull/271
* ci(pre-commit): pre-commit autoupdate by pre-commit-ci in https://github.com/scikit-hep/fastjet/pull/278
* fix: Use environment CXX to configure fastjet-contrib .Makefile.inc by matthewfeickert in https://github.com/scikit-hep/fastjet/pull/276
* fix: Update RPATH and fully guard ORIGIN parameter expansion by matthewfeickert in https://github.com/scikit-hep/fastjet/pull/277
* fix: Remove patch_fastjet_i.txt from MANIFEST.in by matthewfeickert in https://github.com/scikit-hep/fastjet/pull/281
* ci: Add Python 3.12 to testing matrix by matthewfeickert in https://github.com/scikit-hep/fastjet/pull/282
* ci(pre-commit): pre-commit autoupdate by pre-commit-ci in https://github.com/scikit-hep/fastjet/pull/283
* chore(deps): bump the actions group with 1 update by dependabot in https://github.com/scikit-hep/fastjet/pull/284
* ci(pre-commit): pre-commit autoupdate by pre-commit-ci in https://github.com/scikit-hep/fastjet/pull/285
* ci: macos-latest is changing to macos-14 ARM runners by henryiii in https://github.com/scikit-hep/fastjet/pull/288
* ci(pre-commit): pre-commit autoupdate by pre-commit-ci in https://github.com/scikit-hep/fastjet/pull/287
* chore(deps): bump amannn/action-semantic-pull-request from 5.4.0 to 5.5.2 in the actions group by dependabot in https://github.com/scikit-hep/fastjet/pull/289
* ci(pre-commit): pre-commit autoupdate by pre-commit-ci in https://github.com/scikit-hep/fastjet/pull/292
* ci: Use PyPI Trusted Publisher for publishing package by matthewfeickert in https://github.com/scikit-hep/fastjet/pull/294
* chore: bump version to 3.4.2.1 by lgray in https://github.com/scikit-hep/fastjet/pull/299
**Full Changelog**: https://github.com/scikit-hep/fastjet/compare/v3.4.1.3...v3.4.2.1