Change version 2.7.1 -> 2.7.2 (#48)

Signed-off-by: Luis Pinto <luis.pinto@consensys.net>

Author: lu-pinto

build.gradle

@@ -44,7 +44,7 @@ group = "io.consensys.tuweni"
 //////
 // Version numbering
 
-def versionNumber = '2.7.1'
+def versionNumber = '2.7.2'
 def buildVersion = versionNumber + buildTag(buildRelease)
 
 static String buildTag(releaseBuild) {