Bump xalan version to get rid of some namespace errors

See #334.

Author: dr0i

metafacture-biblio/build.gradle

@@ -22,7 +22,7 @@ dependencies {
   implementation project(':metafacture-commons')
   implementation project(':metafacture-flowcontrol')
   implementation 'org.dspace:oclc-harvester2:0.1.12'
-  implementation ('xalan:xalan:2.6.0') {
+  implementation ('xalan:xalan:2.7.0') {
     exclude group: 'xalan', module: 'serializer'
     exclude group: 'xercesImpl', module: 'xercesImpl'
     exclude group: 'xml-apis', module: 'xml-apis'