Update nitrokey-sys dependency to v3.3.0

Now libnitrokey v3.3 is compiled from source, fixing the problems with
older libnitrokey versions (freeing strings, firmware version getter).
Also, bindgen is no longer a build dependency.  This makes the build
process a lot faster.

1 files changed, 0 insertions, 2 deletions

diff --git a/src/lib.rs b/src/lib.rs
index fdc7954..eb5ec5f 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -489,8 +489,6 @@ pub trait Device {
     }
 
     /// Returns the major part of the firmware version (should be zero).
-    /// Note that this method is buggy for libnitrokey older than v3.3.  For
-    /// these versions, this method returns the minor part.
     ///
     /// # Example
     ///