Revert back to 'main'

Author: wetneb

pom.xml

@@ -105,7 +105,7 @@
   <dependencies>
      <dependency>
       <groupId>org.openrefine</groupId>
-      <artifactId>core</artifactId>
+      <artifactId>main</artifactId>
       <version>${openrefine.version}</version>
       <scope>provided</scope>
     </dependency>