xslt-csv: implement dfdlParse as an integrated extension function #8
Description
Integrated extension functions is an alternative way in Saxon to implement Java extensions to XSLT/XPath, rather than the reflexive extension functions used now. The link discribes multiple advantages to integrated vs reflexive, but an additional advantage is that integrated extensions are support in Saxon-HE. This means we can update build.sbt to depend on Saxon-HE, making it easier to quickly jump into modifing this, and adding it to regression suites.