params, swarm: release Geth v1.8.21 and Swarm v0.3.9

params/version.go

@@ -22,9 +22,9 @@ import (
 
 const (
 	VersionMajor = 1        // Major version component of the current release
-	VersionMinor = 9          // Minor version component of the current release
-	VersionPatch = 0          // Patch version component of the current release
-	VersionMeta  = "unstable" // Version metadata to append to the version string
+	VersionMinor = 8        // Minor version component of the current release
+	VersionPatch = 21       // Patch version component of the current release
+	VersionMeta  = "stable" // Version metadata to append to the version string
 )
 
 // Version holds the textual version string.

swarm/version/version.go

@@ -24,7 +24,7 @@ const (
 	VersionMajor = 0        // Major version component of the current release
 	VersionMinor = 3        // Minor version component of the current release
 	VersionPatch = 9        // Patch version component of the current release
-	VersionMeta  = "unstable" // Version metadata to append to the version string
+	VersionMeta  = "stable" // Version metadata to append to the version string
 )
 
 // Version holds the textual version string.