Post-release version bump to 0.13.0

Author: EnricoMi

examples/scala/pom.xml

@@ -2,7 +2,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>uk.co.gresearch.spark</groupId>
   <artifactId>spark-dgraph-connector-examples_2.12</artifactId>
-  <version>0.12.0-3.5</version>
+  <version>0.13.0-3.5-SNAPSHOT</version>
   <name>Spark Dgraph Connector Example</name>
 
   <properties>

pom.xml

@@ -2,7 +2,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>uk.co.gresearch.spark</groupId>
   <artifactId>spark-dgraph-connector_2.12</artifactId>
-  <version>0.12.0-3.5</version>
+  <version>0.13.0-3.5-SNAPSHOT</version>
   <name>Spark Dgraph Connector</name>
   <description>A Spark connector for Dgraph databases</description>
   <inceptionYear>2020</inceptionYear>