Added transformation to convert numeric values to a int64 Fixes jcustenborder#19.

Author: jcustenborder

src/main/java/com/github/jcustenborder/kafka/connect/transform/common/ToLong.java

@@ -38,7 +38,7 @@ public abstract class ToLong<R extends ConnectRecord<R>> extends BaseTransformat
 
  @Override
  public ConfigDef config() {
- return BytesToStringConfig.config();
+ return ToLongConfig.config();
  }
 
  ToLongConfig config;