Bump version to 0.3.0

This change bumps the version of the crate to 0.3.0. The following
notable changes have been made since 0.2.4:
- Added unencrypted command with set subcommand for changing the
  unencrypted volume's read-write mode
- Changed storage hidden subcommand to hidden top-level command
- Renamed storage command to encrypted
- Removed storage status subcommand
  - Moved its output into status command
- Removed previously deprecated --ascii option from otp set command
- Fixed wrong hexadecimal conversion used in otp set command
- Bumped nitrokey dependency to 0.3.5
- Bumped libc dependency to 0.2.66
- Bumped cc dependency to 1.0.48

Author: d-e-s-o

nitrocli/CHANGELOG.md

@@ -1,5 +1,5 @@
-Unreleased
-----------
+0.3.0
+-----
 - Added `unencrypted` command with `set` subcommand for changing the
   unencrypted volume's read-write mode
 - Changed `storage hidden` subcommand to `hidden` top-level command

nitrocli/Cargo.lock

@@ -19,7 +19,7 @@
 
 [package]
 name = "nitrocli"
-version = "0.2.4"
+version = "0.3.0"
 edition = "2018"
 authors = ["Daniel Mueller <[email protected]>"]
 license = "GPL-3.0-or-later"