setup.py: bump PyJWT floor to >=2.11.0 to match the actual runtime requirement

flask_jwt_extended/tokens.py does:

    from jwt.types import Options

…and jwt.types.Options was first added in PyJWT 2.11.0 (2026-01-30).
The current install_requires in setup.py declares PyJWT>=2.0,<3.0,
which is wide enough for resolvers to land on PyJWT 2.10.x and earlier
— those installs then fail at import time with:

    ImportError: cannot import name 'Options' from 'jwt.types'

PR #574 (commit 9bf8d35, 'Bump PyJWT to 2.12.1') already bumped the
dev requirements.txt to PyJWT 2.12.1, but the package's own
install_requires floor was left at >=2.0. This change bridges that
gap so downstream consumers (e.g. flask-appbuilder, apache-airflow)
can rely on pip install flask-jwt-extended resulting in a working
import without having to add their own defensive PyJWT pin.

Same class of issue as #553 — a runtime import that requires a newer
PyJWT than the declared floor admits.

The upper bound (<3.0) is unchanged.

Author: potiuk

setup.py

@@ -31,7 +31,10 @@
     install_requires=[
         "Werkzeug>=0.14",  # Needed for SameSite cookie functionality
         "Flask>=2.0,<4.0",
-        "PyJWT>=2.0,<3.0",
+        # `flask_jwt_extended/tokens.py` imports `Options` from `jwt.types`,
+        # which was first added in PyJWT 2.11.0. Earlier 2.x releases parse
+        # the import-time `from jwt.types import Options` as an ImportError.
+        "PyJWT>=2.11.0,<3.0",
     ],
     extras_require={"asymmetric_crypto": ["cryptography>=3.3.1"]},
     python_requires=">=3.10,<4",