chore[tool]: widen version bounds for asttokens (#4592)

Allow using asttokens 3.0.0 which was released last year.

Author: Romain-Geissler-1A

setup.py

@@ -91,7 +91,7 @@ def _global_version(version):
     py_modules=["vyper"],
     install_requires=[
         "cbor2>=5.4.6,<6",
-        "asttokens>=2.0.5,<3",
+        "asttokens>=2.0.5,<4",
         "pycryptodome>=3.5.1,<4",
         "packaging>=23.1",
         "lark>=1.0.0,<2",