v0.21.0-rc1 Sacrilegious Sloth - superseriousbusiness/gotosocial

Here's version 0.21.0-rc1 of GoToSocial! This is the first release candidate for v0.21.0 aka Sacrilegious Sloth We're really proud of this one, the sloth is starting to feel really useable and good! Please read the migration notes carefully for instructions on how to upgrade to this version...