fix 'SetuptoolsDeprecationWarning'

Author: SimonBlanke

pyproject.toml

@@ -5,15 +5,14 @@ build-backend = "setuptools.build_meta"
 [tool.setuptools.packages.find]
 where = ["src"]
 
-[tool.setuptools]
-license-files = []
-
 [project]
 name = "gradient-free-optimizers"
 version = "1.12.0"
 description = "Lightweight optimization with local, global, population-based and sequential techniques across mixed search spaces "
 readme = "README.md"
 requires-python = ">=3.10"
+license = "MIT"
+license-files = ["LICENSE"]
 keywords = [
   "optimization",
   "hyperparameter-optimization",