Bump version

Osspial · Osspial · commit 9164612d64c5 · 2017-07-17T15:38:57.000-04:00
diff --git a/Cargo.toml b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "hidapi"
-version = "0.3.1"
+version = "0.4.0"
 authors = [
     "Roland Ruckerbauer <roland.rucky@gmail.com>",
     "Osspial <osspial@gmail.com>",
