releaser: Bump versions for release of 0.138.0

[ci skip]

Author: bep

common/hugo/version_current.go

@@ -19,5 +19,5 @@ var CurrentVersion = Version{
 	Major:      0,
 	Minor:      138,
 	PatchLevel: 0,
-	Suffix:     "-DEV",
+	Suffix:     "",
 }