Docx4j 8.2.1 released

[jason]

docx4j 8.2.1 is now in Maven Central.

Its just a minor release:

- OpenDoPE XHTML support: where docx4j Import XHTML is not on classpath, insert an altChunk (ie rely on Word to process the XHTML)

- Traverse into 2010/wordprocessingShape txbxContent

but with a fix for some remaining XXE edge cases: avoid StreamSource in various places

To use it via Maven, just add one and only one of docx4j-JAXB-Internal, docx4j-JAXB-MOXy,
or docx4j-JAXB-ReferenceImpl to your pom. https://search.maven.org/search?q=g:org.docx4j

Otherwise, see https://www.docx4java.org/downloads.html

Minimum supported Java version is 8.0