OXDEV-8629 Mentioned branch compatibility

Author: RahatHameed

README.md

@@ -11,7 +11,11 @@ A collection of security features for OXID eShop
 
 ## Compatibility
 
-This module assumes you have OXID eShop Compilation version 7.2.0 installed.
+This module assumes you have OXID eShop Compilation version 7.3.0 installed.
+
+### Branches
+* `b-7.3.x` - compatible with OXID eShop b-7.3.x branch
+* 1.0.0.x versions (or b-7.2.x branch) - compatible with OXID eShop compilation 7.2.x. b-7.2.x shop compilation branches
 
 # Development installation