releaser: Prepare repository for 0.89.0-DEV

[ci skip]

common/hugo/version_current.go

@@ -16,7 +16,7 @@ package hugo
 // CurrentVersion represents the current build version.
 // This should be the only one.
 var CurrentVersion = Version{
-	Number:     0.88,
-	PatchLevel: 1,
-	Suffix:     "",
+	Number:     0.89,
+	PatchLevel: 0,
+	Suffix:     "-DEV",
 }