Bump master version to 5.1.0-alpha.1 (#536)

* Bump version to 5.0.0-beta.1

* Bump version to 5.1.0-alpha.1

* Switch to grin master

config/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "grin_wallet_config"
-version = "4.1.0-alpha.1"
+version = "5.1.0-alpha.1"
 authors = ["Grin Developers <mimblewimble@lists.launchpad.net>"]
 description = "Configuration for grin wallet , a simple, private and scalable cryptocurrency implementation based on the MimbleWimble chain format."
 license = "Apache-2.0"
@@ -16,7 +16,7 @@ serde_derive = "1"
 toml = "0.5"
 dirs = "2.0"
 
-grin_wallet_util = { path = "../util", version = "4.1.0-alpha.1" }
+grin_wallet_util = { path = "../util", version = "5.1.0-alpha.1" }
 
 [dev-dependencies]
 pretty_assertions = "0.6"