RC 0.7.3 (#389)

* Increment version number to 0.7.3

* CRAN-SUBMISSION

* Delete CRAN-SUBMISSION

RC 0.7.2 (#385)

* Increment version number to 0.7.2

* Use updated cpp11

* CRAN-SUBMISSION

* Delete CRAN-SUBMISSION

Merge pull request #373 from r-lib/rc/0-7-1

RC 0.7.1

RC 0.7.0 (#354)

* Increment version number to 0.7.0

* Update `cran-comments.md`

* CRAN-SUBMISSION

* Delete CRAN-SUBMISSION

Merge pull request #299 from r-lib/rc/0.6.1

RC 0.6.1

Merge pull request #277 from r-lib/rc/0.6.0

RC 0.6.0

Merge pull request #265 from r-lib/rc/0.5.0

RC 0.5.0

Merge pull request #253 from r-lib/rc/0.4.1

RC 0.4.1

Merge pull request #247 from r-lib/rc/0.4.0

RC 0.4.0

Merge pull request #238 from r-lib/rc/0.3.1

RC 0.3.1