Compatibility with pip >= 23.1

[rafaelfelix]

when running pip install python-terraform on pip 22 I get:

DEPRECATION: python-terraform is being installed using the legacy 'setup.py install' method, because it does not have a 'pyproject.toml' and the 'wheel' package is not installed. pip 23.1 will enforce this behaviour change. A possible replacement is to enable the '--use-pep517' option. Discussion can be found at https://github.com/pypa/pip/issues/8559
  Running setup.py install for python-terraform ... done