[saxon-upgrade] Ongoing development, 2 Tests left ...
[saxon-upgrade] Saxon 9.4 lib
[saxon-upgrade] resolving name resolution (NodeTest#toString() had changed, changed to NamePool#getLocalName(int code)) and corresponding TestCase
[saxon-upgrade] handle the return section of given let expression, too
[saxon-upgrade] updated filterhandling in SaxonReferenceFinderImpl
[saxon-upgrade] added serialization of Assignations
[saxon-upgrade] added a new test case to cover the proper work of the dependency engine with the new saxon version
[saxon-upgrade] handle all assignations, code formatted
[saxon-upgrade] added tests of nodecomparisions and for-expressions
Merge saxon-9.4 into development

Conflicts:
	core/build.number
	core/src/main/java/de/betterform/xml/xforms/xpath/saxon/function/extensions/BFSort.java
	core/src/main/java/de/betterform/xml/xforms/xpath/saxon/function/xpath/Props2XML.java
	core/src/main/java/de/betterform/xml/xpath/impl/saxon/SaxonReferenceFinderImpl.java
	core/src/main/java/de/betterform/xml/xpath/impl/saxon/SaxonXPathExpressionSerializer.java
	core/src/main/resources/META-INF/version.info