Release version 0.6.0

[usmap-bot]

🚀 usmapdata v0.6.0 release candidate

📝 Pre-release checklist

• Review automated changes
• Review reverse dependency checks (see workflow artifacts)
• Review check and test results
• Verify DESCRIPTION and NEWS.md are accurate
• Update cran-comments.md if necessary
• Run devtools::release() from this branch
• Perform necessary CRAN verification release steps (see maintainer email)

⏳ Wait for CRAN to publish package. If changes are requested, commit fixes to this pull request and re-run devtools::release().

📝 Post-release checklist

• git tag v0.6.0
• git push --tags
• Update DESCRIPTION versions to 0.6.0.9000
• Add [unreleased] title at top of NEWS.md
• Add release date of latest version to NEWS.md
  • Example Released Monday, February 31, 2020.
• Commit changes with message Prepare for next release

✅ Merge this pull request when all post-release tasks are complete.

📝 Post-merge Steps

• Create release linked to v0.6.0 tag with release notes from NEWS.md.

[pdil]

usmapdata 0.6.0 has been submitted to CRAN