Update nitrokey crate to 0.4.0-alpha.0

This is patch marks the first step in the process of updating the
nitrokey dependency to version 0.4. In particular, it integrates with
the first alpha version.
The main change on the nitrocli side accompanying the version bump is
that the nitrokey::CommandError got replaced by a more general
nitrokey::Error which includes the former variant.

Import subrepo nitrokey/:nitrokey at d433189caefe6bd6c88da7fbb1d6e9304353eb83

1 files changed, 33 insertions, 2 deletions

diff --git a/nitrokey/CHANGELOG.md b/nitrokey/CHANGELOG.md
index 04da117..24c79af 100644
--- a/nitrokey/CHANGELOG.md
+++ b/nitrokey/CHANGELOG.md
@@ -1,5 +1,36 @@
-# v0.3.5 (2019-12-16)
-- Update the nitrokey-sys dependency version specification to ~3.4.
+<!---
+Copyright (C) 2019 Robin Krahl <robin.krahl@ireas.org>
+SPDX-License-Identifier: MIT
+-->
+
+# Unreleased
+- Remove the `test-pro` and `test-storage` features.
+- Implement `Display` for `Version`.
+- Introduce `DEFAULT_ADMIN_PIN` and `DEFAULT_USER_PIN` constants.
+- Refactor the error handling code:
+  - Implement `std::error::Error` for `CommandError`.
+  - Add the `Error` enum.
+  - Add the `LibraryError` enum and move the library error variants from
+    `CommandError` to `LibraryError`.
+  - Add the `CommunicationError` enum and move the communication error variants
+    from `CommandError` to `CommunicationError`.
+  - Return `Error` instead of `CommandError` in all public functions.
+  - Move the `CommandError::RngError` variant to `Error::RandError` and the
+    `CommandError::Unknown` variant to `Error::UnknownError`.
+  - Return `CommunicationError::NotConnected` instead of
+    `CommandError::Undefined` from the connect functions.
+  - Remove the `CommandError::Undefined` variant.
+- Add a private `PhantomData` field to `Pro` and `Storage` to make direct
+  instantiation impossible.
+- Refactor and clean up internal code:
+  - Prefer using the `Into` trait over numeric casting.
+  - Add `Pro::new` and `Storage::new` functions.
+- Implement `From<Pro>` and `From<Storage>` for `DeviceWrapper`.
+- Add `Error::Utf8Error` variant.
+  - Return `Result<Version>` instead of `Version` from `get_library_version`.
+  - Return `Error::Utf8Error` if libnitrokey returns an invalid UTF-8 string.
+- Implement `From<(T: Device, Error)>` for `Error`.
+- Fix timing issues with the `totp_no_pin` and `totp_pin` test cases.
 
 # v0.3.4 (2019-01-20)
 - Fix authentication methods that assumed that `char` is signed.