Add missing NOTICE.txt files and update copyright year to 2021

git-svn-id: https://svn.apache.org/repos/asf/turbine/fulcrum/trunk/json@1890170 13f79535-47bb-0310-9956-ffa450edef68
1 file changed
tree: 7ea2cd5b497ebef4720df570d5b75805d910997a
  1. api/
  2. dist/
  3. gson/
  4. jackson/
  5. jackson2/
  6. src/
  7. xdocs/
  8. LICENSE
  9. NOTICE
  10. pom.xml
  11. README