message: Add cosmwasm-crypto badge
diff: # CosmWasm Crypto
  +[![cosmwasm-crypto on crates.io](https://img.shields.io/crates/v/cosmwasm-crypto.svg)](https://crates.io/crates/cosmwasm-crypto)
  +
  This crate implements cryptography-related functions, so that they can be
  available for both, the [cosmwasm-vm](`https://crates.io/crates/cosmwasm-vm`)
  and [cosmwasm-std](`https://crates.io/crates/cosmwasm-std`) crates.
  