Bump dependency on generic-array to version 1.0.0

[schoenenberg]

Hi,

I have noticed that the generic-array crate has released version 1.0.0. Can we bump the dependency of the aes-gcm-siv crate?

[tarcieri]

We're migrating to hybrid-array in the next release. You can follow along here:

RustCrypto/traits#1319