Upgraded to pybind11 3

Author: JohanMabille

README.md

@@ -204,7 +204,7 @@ from the `docs` subdirectory.
 
 | `xtensor-python` | `xtensor` |  `pybind11`      |
 |------------------|-----------|------------------|
-| master           |  ^0.26.0  | >=2.6.1,<3       |
+| master           |  ^0.26.0  | >=2.6.1,<4       |
 | 0.28.0           |  ^0.26.0  | >=2.6.1,<3       |
 | 0.27.0           |  ^0.25.0  | >=2.6.1,<3       |
 | 0.26.1           |  ^0.24.0  | ~2.4.3           |

environment-dev.yml

@@ -8,7 +8,7 @@ dependencies:
   # Host dependencies
   - xtensor>=0.26,<0.27
   - numpy>=2.0
-  - pybind11>=2.12.0,<3
+  - pybind11>=2.12.0,<4
   # Test dependencies
   - setuptools
   - pytest