Switch to newer license metadata format

Author: SamWilsn

pyproject.toml

@@ -1,5 +1,5 @@
 [build-system]
-requires = ["setuptools>=61", "wheel"]
+requires = ["setuptools>=77.0.3", "wheel"]
 build-backend = "setuptools.build_meta"
 
 [project]
@@ -8,10 +8,9 @@ description = "Ethereum execution layer specification, provided as a Python pack
 readme = "README.md"
 requires-python = ">=3.11"
 dynamic = ["version"]
-license = { file = "LICENSE.md" }
+license = "CC0-1.0"
 urls = { "Homepage" = "https://github.com/ethereum/execution-specs" }
 classifiers = [
-    "License :: CC0 1.0 Universal (CC0 1.0) Public Domain Dedication",
     "Programming Language :: Python :: 3",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: Implementation :: PyPy",
@@ -163,7 +162,6 @@ test = [
 ]
 
 lint = [
-    "types-setuptools>=68.1.0.1,<69",
     "isort==5.13.2",
     "mypy==1.14.1",
     "black==23.12.0",