Bump version for next release cycle

Author: sirhcel

Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 
 name = "spidev"
-version = "0.6.1"
+version = "0.6.2-alpha.0"
 authors = [
     "Paul Osborne <osbpau@gmail.com>",
     "The Embedded Linux Team <embedded-linux@teams.rust-embedded.org>"