Update license identifiers

Author: RealOrangeOne

pyproject.toml

@@ -12,10 +12,10 @@ authors = [
 ]
 version = "0.8.0"
 readme = "README.md"
-license = {file = "LICENSE"}
+license = "BSD-3-Clause"
+license-files = ["LICENSE"]
 classifiers = [
     "Development Status :: 3 - Alpha",
-    "License :: OSI Approved :: BSD License",
     "Programming Language :: Python :: 3",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",