Merge branch 'mutable-references' into next

RFC:
	https://lists.sr.ht/~ireas/nitrokey-rs-dev/%3C20190126174327.tbuyk2s535kfiqm4%40localhost%3E
	https://lists.sr.ht/~ireas/nitrokey-rs-dev/%3C43cc304d-23e8-7f95-2167-ce3f0530b81e%40posteo.net%3E

* mutable-references:
  Store mutable reference to Device in PasswordSafe
  Refactor User and Admin to use a mutable reference
  Require mutable reference if method changes device state
  Add device_mut method to DeviceWrapper
  Implement DerefMut for User and Admin

1 files changed, 8 insertions, 0 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
index a9e3065..9227510 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -34,6 +34,14 @@ SPDX-License-Identifier: MIT
 - Always return a `Result` in functions that communicate with a device.
 - Combine `get_{major,minor}_firmware_version` into `get_firmware_version`.
 - Add `set_encrypted_volume_mode` to `Storage`.
+- Use mutability to represent changes to the device status:
+  - Implement `DerefMut` for `User<T>` and `Admin<T>`.
+  - Add `device_mut` method to `DeviceWrapper`.
+  - Require a mutable `Device` reference if a method changes the device state.
+- Let `Admin` and `User` store a mutable reference to the `Device` instead of
+  the `Device` value.
+- Let `PasswordStore` store a mutable reference to the `Device` instead of a
+  non-mutable reference.
 
 # v0.3.4 (2019-01-20)
 - Fix authentication methods that assumed that `char` is signed.