updated tests for the from_formula init and removed setup.py to get a

See merge request !20

PLNPCA with the previous instance of coef and _components. Much much
faster.

pyproject.toml

Dev

See merge request bbatardiere/pyplnmodels!19

minor change.

See merge request !17

try to upload to pypi

See merge request !16

merged dmatrix branch that uses dmatrix to initialize each model.

See merge request !15

project.

test_pln_full and tests for only plnpca inside test_plnpca

sone setters properly.