License error in pyproject.toml

[hyandell]

The license in the LICENSE file is BSD-3-Clause, but the pyproject.toml has it incorrectly as BSD-4-Clause.

pyproject.toml:license = "BSD-4-Clause"

(BSD-4-Clause was an older version, now rare to see, which required all 'advertising of a provided feature' to identify the license)