replace deprecated function and prep for next release

main.go

@@ -13,16 +13,11 @@ import (
 
 var (
 	// Version is the main version number that is being run at the moment.
-	Version = "0.6.2"
-
-	// VersionPrerelease is A pre-release marker for the Version. If this is ""
-	// (empty string) then it means that it is a final release. Otherwise, this
-	// is a pre-release such as "dev" (in development), "beta", "rc1", etc.
-	VersionPrerelease = ""
+	Version = "0.6.3"
 
 	// PluginVersion is used by the plugin set to allow Packer to recognize
 	// what version this plugin is.
-	PluginVersion = version.InitializePluginVersion(Version, VersionPrerelease)
+	PluginVersion = version.NewRawVersion(Version)
 )
 
 func main() {