[pyproject] Update license table to PEP 639 format

Fixes #49

This change is based on the work originally done in [#50](#50)

Co-Authored-By: Nicholas Hairs <info@nicholashairs.com>

Author: V1rg1lee

pyproject.toml

@@ -19,11 +19,11 @@ requires-python = ">=3.10"
 
 # Extra information
 readme = "README.md"
-license = {text = "BSD-2-Clause License"}
+license = "BSD-2-Clause"
+license-files = "LICENSE"
 classifiers = [
     "Development Status :: 6 - Mature",
     "Intended Audience :: Developers",
-    "License :: OSI Approved :: BSD License",
     "Operating System :: OS Independent",
     "Programming Language :: Python :: 3 :: Only",
     "Programming Language :: Python :: 3.10",