Bump cryptography dependency ceiling to <50 (N+3)

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Co-authored-by: gladjohn <90415114+gladjohn@users.noreply.github.com>

Author: Copilot

setup.cfg

@@ -53,7 +53,7 @@ install_requires =
     # And we will use the cryptography (X+3).0.0 as the upper bound,
     # based on their latest deprecation policy
     # https://cryptography.io/en/latest/api-stability/#deprecation
-    cryptography>=2.5,<49
+    cryptography>=2.5,<50
 
 
 [options.extras_require]