• Update documentation to conform to HTML5

• Handle email where the CC is N/A

• Use googledrive::with_drive_quiet() to comply with googledrive 2.0.0

Bug fixes

• Fix a bug that prevented interactive confirmation when sending mail (@bcheggeseth, #10)

• Throw error if not authenticated against gmail, and provide better setup instructions to use gmailr::gm_auth(), suggested by @maelle in #3

• First release to CRAN