any: Fail to deserialise $bytes with from JSON

[aDotInTheVoid]

#[test]
fn bytes_from_json() {
    let i = to_any(json!({"exampleBytes": {
        "$bytes": "nFERjvLLiw9qm45JrqH9QTzyC2Lu1Xb4ne6+sBrCzI0"
    }}))
    .unwrap();

    assert_eq!(
        i,
        any!({
            "exampleBytes": vec![0x9c, 0x51, 0x11]
        })
    )
}

running 1 test
test any::tests::bytes_from_json ... FAILED

failures:

---- any::tests::bytes_from_json stdout ----
thread 'any::tests::bytes_from_json' panicked at 'assertion failed: `(left == right)`
  left: `Map({"exampleBytes": Map({"$bytes": String("nFERjvLLiw9qm45JrqH9QTzyC2Lu1Xb4ne6+sBrCzI0")})})`,
 right: `Map({"exampleBytes": Bytes(Bytes { bytes: [156, 81, 17] })})`', triphosphate-vocab/src/any/tests.rs:74:5
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace


failures:
    any::tests::bytes_from_json

test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 25 filtered out; finished in 0.00s

error: test failed, to rerun pass `-p triphosphate-vocab --lib`