Release Version V0.2.6

[wangben718]

Release new version related to the maintainer update:

First release

• Proof read Title: and Description: and ensure they are informative
• Check that all exported functions have @return and @examples
• Check that Authors@R: includes a copyright holder (role 'cph')
• Review extrachecks
• usethis::use_cran_comments() (optional)

Prepare for release

• Check current CRAN check results
• Check licensing of included files
• Review pkgdown reference index for, e.g., missing topics
• Bump version
• Update cran-comments.md (optional)
• Update NEWS.md
• Review pkgdown website
• urlchecker::url_check()
• Check with local machine
• Check with GitHub Actions
• Check with win-builder

Submit to CRAN

• Draft GitHub release
• Submit to CRAN via web form
• Approve emails

Wait for CRAN

• Accepted 🎉
• Post on r-packages mailing list
• Tweet