v1.3.1

1.3.1 (2026-07-03)

Manual out-of-band release from the v1.3.0 tag (not via release-please —
main has since diverged with in-progress, breaking work). See
tech-debt.md ("Release process: single-branch release-please + stacked
PRs on a red main") for why.

Bug Fixes

• deps: pin rtb-data<2 to protect this release line from an upcoming
  breaking rtb-data reorganisation (renamed/deleted model folders) that
  will ship as rtb-data 2.0 alongside the next roboticstoolbox-python
  major/minor release. Without this pin, any fresh pip install roboticstoolbox-python would silently pick up the incompatible new
  rtb-data and fail to load bundled robot models.