Merge branch 'develop' into 'main'

...e/src/main/java/info/textgrid/middleware/IDIOMImages.java

...nfo/textgrid/middleware/IdentifierListDelivererIDIOM.java

...re/src/main/java/info/textgrid/middleware/OAIPMHImpl.java

...c/main/java/info/textgrid/middleware/OAIPMHUtilities.java

...ava/info/textgrid/middleware/RecordDelivererDATACITE.java

...n/java/info/textgrid/middleware/RecordDelivererIDIOM.java

...va/info/textgrid/middleware/RecordListDelivererIDIOM.java

...e/src/main/java/info/textgrid/middleware/TGConstants.java

...va/info/textgrid/middleware/test/TestOAIPMHUtilities.java

...va/info/textgrid/middleware/test/TestTGOAIPMHLocally.java

...extgrid/middleware/test/online/OAIPMHUtilitiesOnline.java

...test/resources/oaipmh.test.dev-textgridlab-org.properties

pom.xml