Update to CDK 2.9

[zachcp]

• [x] egonw update request
• [ ] Implement Release note figures as vignettes.
  • [x] 2.9 Release Notes
  • [ ] 2.8 Release Notes
  • [ ] 2.5 Release Notes
  • [ ] 2.4 Release Notes
  • [ ] 2.2 Release Notes
• [x] Take a stab at the open issues
• [ ] Add auto close of stale issues.
• [x] Create an Icon
• [x] Get cdklibs 2.9 to CRAN.

[egonw]

@zachcp, this has been completed, right?

[zachcp]

Yes. I can move the docs/release notes to a seperate issue.