Update dependencies (json-fortran and bspline-fortran)
Current versions:
- json-fortran: 8.2.5
- bspline-fortran: 5.3.0
Latest versions (at the time of writing):
Pending MRs:
- json-fortran: https://github.com/jacobwilliams/json-fortran/pull/586
- bspline-fortran: https://github.com/jacobwilliams/bspline-fortran/pull/93