packrat: release 0.9.1

[aronatkins]

Prepare for release

• Switch to main and pull.

  git checkout main
  git pull

• Create and switch to a release branch (e.g. release/<version>).

  git checkout -b release/0.9.1

• Update version in DESCRIPTION file.

• Update header and version in NEWS.md. confirm recent changes are
  included. (style reference)

• Update auto-loaders (from R):

  source("R/update.R"); updateInit();

• Commit your changes!

  git commit -m 'preparing for 0.9.1 release' NEWS.md DESCRIPTION inst

• Check current CRAN check results:
  https://cran.rstudio.org/web/checks/check_results_packrat.html

• Check that all URLs are valid (from R):

  install.packages("urlchecker")
  urlchecker::url_check()

• Generate a release .tar.gz by running the following command from the
  parent directory of your packrat repository:

  R CMD build packrat

• Test the package (also from the parent directory):

  R CMD check --as-cran packrat_*.tar.gz

• Push the branch to GitHub and let our CI workflow run.

• Fix any issues identified by the previous steps. Rinse and repeat.

Submit to CRAN

• Submit to CRAN. Cross fingers. https://cran.r-project.org/

• Wait for CRAN approval.

Approved by CRAN

• Squash-and-merge the release/<version> branch back to main.

• Create a git tag for your new release and push that tag.

  git fetch
  git tag -a -m 'CRAN release: vX.Y.Z' vX.Y.Z COMMIT_HASH
  git push origin vX.Y.Z

• Create a GitHub release from the tag and include its NEWS.md items as
  release notes.

• Create a branch to bump for development (e.g. development/X.Y.Z+1).

  git checkout main
  git checkout -b development/X.Y.Z+1

• Update NEWS.md with an "unreleased" version header and run the following
  command to update DESCRIPTION and the auto-loaders:

  R -f configure.R

• Commit your changes!

  git commit -m 'preparing for X.Y.Z+1 development' NEWS.md DESCRIPTION inst

• Push the development/X.Y.Z+1 branch to GitHub, create a PR, and let CI
  run.

• Squash-and-merge the PR with the development/X.Y.Z.1 changes back to main.

[aronatkins]

Release PR: #707

[aronatkins]

GH release (from tag): https://github.com/rstudio/packrat/releases/tag/v0.9.1

[aronatkins]

Post-release PR: #708