Make prerelease a release branch

Author: dibarbet

version.json

@@ -1,8 +1,9 @@
 {
 	"$schema": "https://raw.githubusercontent.com/dotnet/Nerdbank.GitVersioning/master/src/NerdBank.GitVersioning/version.schema.json",
-	"version": "2.0-beta",
+	"version": "2.0",
 	"publicReleaseRefSpec": [
-		"^refs/heads/release$"
+		"^refs/heads/release$",
+		"^refs/heads/prerelease$"
 	],
 	"cloudBuild": {
 		"buildNumber": {