Updating version

Author: makam

pom.xml

@@ -13,7 +13,7 @@
 		<proton-j-version>0.22.0</proton-j-version>
 	  	<junit-version>4.12</junit-version>
 		<slf4j-version>1.8.0-alpha2</slf4j-version>
-		<client-current-version>2.0.0-preview1</client-current-version>
+		<client-current-version>2.0.0-preview2</client-current-version>
 	</properties>
 
 	<modules>