Fix StatusWords::code output for StatusWords::VerifyFailError (#479)

* Fix `StatusWords::code` output for `StatusWords::VerifyFailError`

Closes iqlusioninc/yubikey.rs#473.

* Refactor `Transaction::transfer_data` to match on `StatusWords`

This makes the code more reliable, such that it would have avoided
the bug in iqlusioninc/yubikey.rs#473.

CHANGELOG.md

@@ -19,6 +19,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   calling `YubiKey::disconnect(pcsc::Disposition::LeaveCard)` if `Reader::open`
   succeeds).
 
+### Fixed
+- `StatusWords::code` now returns the correct code (including embedded `tries`
+  count) for `StatusWords::VerifyFailError`. Previously the returned code lost
+  information and was not round-trip compatible with `StatusWords::from(u16)`.
+
 ## 0.7.0 (2022-11-14)
 ### Added
 - Display inner PC/SC errors ([#420])