Raise maximum version of cryptography

[WFT]

Explanation

The cryptography dependency is limited to cryptographty >= 40.0.0, < 42 in your setup.py. I suggest allowing major version 42.

Motivation

The latest version of cryptography (42.0.4) fixes a CVE:

* Fixed a null-pointer-dereference and segfault that could occur when creating
  a PKCS#12 bundle. Credit to **Alexander-Programming** for reporting the
  issue. **CVE-2024-26130**

Since this library limits its version of cryptography, no one who depends on this library can use the updated version.

Version 42 Changes

The cryptography changelog only lists two ‘backwards incompatible changes’ in version 42. I don’t see any direct usage of the two mentioned functions using GitHub code search, but I’m not familiar with all the ways cryptography might be used in this library.

* **BACKWARDS INCOMPATIBLE:** Dropped support for LibreSSL < 3.7.
* **BACKWARDS INCOMPATIBLE:** Loading a PKCS7 with no content field using
    :func:`~cryptography.hazmat.primitives.serialization.pkcs7.load_pem_pkcs7_certificates`
  or
  :func:`~cryptography.hazmat.primitives.serialization.pkcs7.load_der_pkcs7_certificates`
  will now raise a ``ValueError`` rather than return an empty list.

[alexanderjordanbaker]

PR #61 will cover this

[WFT]

Thanks!