Release pak 0.5.0

[gaborcsardi]

Prepare for release:

• [x] git pull
• [x] Check current CRAN check results
• [x] Check if any deprecation processes should be advanced, as described in Gradual deprecation
• [ ] Polish NEWS
• [ ] devtools::build_readme()
• [ ] urlchecker::url_check()
• [ ] devtools::check(remote = TRUE, manual = TRUE)
• [ ] devtools::check_win_devel()
• [ ] rhub::check_for_cran()
• [ ] revdepcheck::cloud_check()
• [ ] Update cran-comments.md
• [ ] git push
• [ ] Draft blog post
• [ ] Slack link to draft blog in #open-source-comms

Submit to CRAN:

• [ ] usethis::use_version('minor')
• [ ] devtools::submit_cran()
• [ ] Approve email

Wait for CRAN...

• [ ] Accepted :tada:
• [ ] git push
• [ ] usethis::use_github_release()
• [ ] usethis::use_dev_version()
• [ ] git push
• [ ] Finish blog post
• [ ] Tweet
• [ ] Add link to blog post in pkgdown news menu

[gaborcsardi]

This is a duplicate, work was done in #482.