build(deps-dev): bump nanobind from 2.13.0 to 2.14.0

[dependabot]

Bumps nanobind from 2.13.0 to 2.14.0.

Changelog

Sourced from nanobind's changelog.

Version 2.14.0 (Aug 7, 2026)

• Implicit conversion to integer-typed arguments now requires that the input implement Python's __index__ protocol, which is reserved for lossless integer conversion. The previous implementation explicitly rejected Python float arguments, but mistakenly accepted (and truncated) floating point types that are not float subclasses, such as np.float32. It also accepted strings like "123". Both are considered bugs, hence this change lands in a minor release despite being observable from Python. Arguments such as bool, enum.IntEnum, and NumPy integer scalars continue to convert as before. (commits d33465 <https://github.com/wjakob/nanobind/commit/d33465e4a2d1f48e6210dbe6a7c44f7bf2b1fae2>, a29b10 <https://github.com/wjakob/nanobind/commit/a29b106f9eb55562d8fe749c3e94bb77621121c2>).

• The type casters for STL sets, maps, and enumerations now check whether an input is convertible up front instead of raising and immediately discarding a Python exception. Since overload resolution routinely probes casters with non-matching arguments, this removes exception overhead from a hot path. (commit 6d130f <https://github.com/wjakob/nanobind/commit/6d130fed8e05de8f89b608570fe720406f7a578f>__).

• nanobind now ships a workaround for spurious leak reports caused by an issue in the typing module. It also fixes an issue where references to internal types were leaked, which generated warnings in valgrind. (commits acd95d <https://github.com/wjakob/nanobind/commit/acd95d4144d169323cc6b706b957711cf9d366ba>, 31618e <https://github.com/wjakob/nanobind/commit/31618ea0cb359f8546f2132930e26d4def29bf98>).

• Stubgen: read-only static properties are now annotated as Final[T] and read-write ones as ClassVar[T]. ClassVar[Final[T]] is no longer generated. Overriding a read-only static property in a subclass now also works. (commit 4a8f4f <https://github.com/wjakob/nanobind/commit/4a8f4fcfe802174d6351b91b677ffef4fb2f2e5b>__).

• Miscellaneous minor fixes and improvements. (PRs [#1389](https://github.com/wjakob/nanobind/issues/1389) <https://github.com/wjakob/nanobind/pull/1389>, [#1390](https://github.com/wjakob/nanobind/issues/1390) <https://github.com/wjakob/nanobind/pull/1390>, [#1392](https://github.com/wjakob/nanobind/issues/1392) <https://github.com/wjakob/nanobind/pull/1392>, [#1394](https://github.com/wjakob/nanobind/issues/1394) <https://github.com/wjakob/nanobind/pull/1394>, commits 450d2e <https://github.com/wjakob/nanobind/commit/450d2e9290ee3e6de7befa8da5bbc75c7a013cd1>, 341ac4 <https://github.com/wjakob/nanobind/commit/341ac459cbae37ee622c9b12c020bb3dc87db13c>).

Commits

• 86e5626 v2.14.0 release
• c9c0b37 changelog updates
• acd95d4 Fix reference leaks of nanobind's internal type objects
• a29b106 int caster: fix regression in the previous commit
• d33465e int caster: require __index__ for implicit integer conversion
• 341ac45 FAQ: policy for AI-assisted contributions
• 6fa7215 Allow use of nanobind/eigen/sparse.h without nanobind/eigen/dense.h
• 450d2e9 Pin Python interpreter in CI build matrix
• 74f78c4 Add AIX Support
• ff6a401 Improve compatibility of nanobind.stubgen with scikit-build-core
• Additional commits viewable in compare view

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