bump version to 0.3.0-alpha1
diff --git a/Cargo.toml b/Cargo.toml
index 6e6ad15..1c77575 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "tuf"
-version = "0.2.0"
+version = "0.3.0-alpha1"
 authors = [ "heartsucker <heartsucker@autistici.org>" ]
 description = "Library for The Update Framework (TUF)"
 homepage = "https://github.com/heartsucker/rust-tuf"