Revert to last published version ahead of release

Author: eldruin

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "sysfs-pwm"
-version = "0.2.0"
+version = "0.1.0"
 authors = [
     "Rust Embedded WG Linux Team <embedded-linux@teams.rust-embedded.org>",
     "Paul Osborne <osbpau@gmail.com>"