v2.0.1

• Fix migrations 🤦 They worked when they were written, but a bunch of things changed in GoatCounter and some older ones didn't run any more.

• Add -test flag to goatcounter db migrate to rollback a migration, so it's easier to test if migrations will run correctly without actually changing the database.

Be sure to read the release notes for 2.0.0 as there are some incompatibilities and manual actions!