Version 1.14.0

ADDED

- Add massive Q-V-Q vertex, adding support for Vbb and Vtt processes
  ([!312](https://gitlab.com/spice-mc/pepper/-/merge_requests/312))

- Add a `Pepper::Process` constructor overload taking a per-process
  `n_max_quark_pairs` limit, so a host application driving several jet
  multiplicities can restrict each of them separately instead of only
  run-wide via `[main] n_max_quark_pairs`; this also adds missing documentation
  for the setting
  ([!321](https://gitlab.com/spice-mc/pepper/-/merge_requests/321))

- Add process group files for definite-charge W-boson production,
  selectable via the `ppwm` and `ppwp` base specifiers
  (with up to six additional jets),
  next to the existing charge-summed `ppev` specifier
  ([!323](https://gitlab.com/spice-mc/pepper/-/merge_requests/323))

- Add a process group file for pp -> 6j,
  along with the color factor files needed for this process
  ([479c65b3](https://gitlab.com/spice-mc/pepper/-/commit/479c65b3eaf93a7331e4604cc4282c496a13143b))

- Add description attribute to the file metadata
  ([!320](https://gitlab.com/spice-mc/pepper/-/merge_requests/320))

FIXED

- Refer to the photon as "A" and parse particle names case-insensitively
  ([1be71bbd](https://gitlab.com/spice-mc/pepper/-/commit/1be71bbdb1dbb3b5014a8fd3b973061b2096fe0f))

CHANGED

- **Breaking:** Revert the 2.3.0 LHEH5 change and count all particles,
  incoming and outgoing, in `npLO` again, bumping the format version to 2.6.0.
  This restores agreement with Sherpa's LHEH5 writer
  and with Pepper's own `Event_reader`. Counting all particles is however
  inconsistent with the definition in arXiv:2309.13154, so that's a trade-off.
  However, ultimately we deemed it more important to be consistent
  with actual implementations.
  ([!319](https://gitlab.com/spice-mc/pepper/-/merge_requests/319))