* maximum working bumpalo version
* explicit comment to explain version locking
* removes incorrect comment
* moves serde version lock to dev dependencies
* removes serde dependencies
* reverts serde removal in crypto library
* Add crate arbitrary as ctap's optional dependency, when feature "fuzz"
is activated.
* Derive Arbitrary for all the necessary types in order to generate the
concrete types from random bytes.
* Add a fuzz target that transforms the input to valid format for
MakeCredential.
