Gingerbread Activation blocks (#2180)

Description
Gingerbread Activation blocks:

Mainnet:
P1 & P2: 21616000 -> ~ 26/Sept/2023 17:15 UTC

Alfajores:
P1 & P2: 9814000 -> ~ 11/Sept/2023 17:30 UTC

Baklava:
P1: 18785000 -> 10/Aug/2023, 3:07:54 PM UTC
P2: 19157000 -> 01/Sept/2023, 2:08:22 PM UTC

params/config.go

@@ -65,8 +65,8 @@ var (
 		ChurritoBlock:       big.NewInt(6774000),
 		DonutBlock:          big.NewInt(6774000),
 		EspressoBlock:       big.NewInt(11838440),
-		GingerbreadBlock:    nil,
-		GingerbreadP2Block:  nil,
+		GingerbreadBlock:    big.NewInt(21616000),
+		GingerbreadP2Block:  big.NewInt(21616000),
 		Istanbul: &IstanbulConfig{
 			Epoch:          17280,
 			ProposerPolicy: 2,
@@ -92,8 +92,8 @@ var (
 		ChurritoBlock:       big.NewInt(2719099),
 		DonutBlock:          big.NewInt(5002000),
 		EspressoBlock:       big.NewInt(9195000),
-		GingerbreadBlock:    nil,
-		GingerbreadP2Block:  nil,
+		GingerbreadBlock:    big.NewInt(18785000),
+		GingerbreadP2Block:  big.NewInt(19157000),
 		Istanbul: &IstanbulConfig{
 			Epoch:          17280,
 			ProposerPolicy: 2,
@@ -119,8 +119,8 @@ var (
 		ChurritoBlock:       big.NewInt(4960000),
 		DonutBlock:          big.NewInt(4960000),
 		EspressoBlock:       big.NewInt(9472000),
-		GingerbreadBlock:    nil,
-		GingerbreadP2Block:  nil,
+		GingerbreadBlock:    big.NewInt(19814000),
+		GingerbreadP2Block:  big.NewInt(19814000),
 		Istanbul: &IstanbulConfig{
 			Epoch:          17280,
 			ProposerPolicy: 2,

params/version.go

@@ -26,7 +26,7 @@ import (
 // "1.3.0-beta", "1.3.0-beta.2", etc. and then "1.3.0-stable", "1.3.1-stable", etc.
 const (
 	VersionMajor = 1          // Major version component of the current release
-	VersionMinor = 6          // Minor version component of the current release
+	VersionMinor = 8          // 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
 )