[xmlunit/xmlunit] 8475d7: release XMLUnit for Java 2.8.3

[Stefan B. <no...@gi...>]

  Branch: refs/tags/v2.8.3
  Home:   https://github.com/xmlunit/xmlunit
  Commit: 8475d71a3d9a0b5addb5cf5efbbf6a4c1128867e
      https://github.com/xmlunit/xmlunit/commit/8475d71a3d9a0b5addb5cf5efbbf6a4c1128867e
  Author: Stefan Bodewig <ste...@fr...>
  Date:   2021-10-17 (Sun, 17 Oct 2021)

  Changed paths:
    M .travis.yml
    M RELEASE_NOTES.md
    M pom.xml
    M xmlunit-assertj/pom.xml
    M xmlunit-assertj3/pom.xml
    M xmlunit-core/pom.xml
    M xmlunit-legacy/pom.xml
    M xmlunit-matchers/pom.xml
    M xmlunit-placeholders/pom.xml

  Log Message:
  -----------
  release XMLUnit for Java 2.8.3