doctest 0.3.0

• Added a @doctestExample tag as a drop-in replacement for @example.
• Error handling has been improved.
• Fix compatibility with roxygen 7.3.0. Thanks @hadley.

doctest 0.2.0

• First CRAN release.
• Added a NEWS.md file to track changes to the package.
• Fixed compatibility with purrr 1.0.0.
• New vignette “Converting a package to use doctest”.