Update CHANGELOG for the IMAP support work from Fabian Staubli
Update CHANGELOG for the IMAP support work from Fabian Staubli

schepedw/mail,0x00evil/mail,Schniz/mail,pushrax/mail,agaridata/mail,wktk/mail,zacholauson/mail,EdwardPantoja/mail,carsonreinke/mail,kert-io/mail,mikel/mail,missive/mail,jeremyevans/mail,yujinakayama/mail,kaineer/mail,smallspark/mail,pjskennedy/mail,owenr/mail,kaineer/mail,carsonreinke/mail,agaridata/mail,pascalbetz/mail,jonkgrimes/mail,pushrax/mail,schneems/mail,zacholauson/mail,jonkgrimes/mail,pjskennedy/mail,jeremyevans/mail,jeremy/mail,planio-gmbh/mail,benmmurphy/mail,kjg/mail,EdwardPantoja/mail,kjg/mail,0x00evil/mail,schepedw/mail,jeremy/mail,benmmurphy/mail,schneems/mail,kainlite/mail,wktk/mail,kert-io/mail,smallspark/mail