Bump version to 1.3.0-SNAPSHOT

1.2.0 released several months ago.

pom.xml

@@ -9,7 +9,7 @@
 
   <groupId>org.gaul</groupId>
   <artifactId>s3proxy</artifactId>
-  <version>1.2.0-SNAPSHOT</version>
+  <version>1.3.0-SNAPSHOT</version>
   <packaging>jar</packaging>
 
   <name>S3 Proxy</name>