Fix migration package name mismatch

db/migrations/20201003111749_add_starred_at_index.go

@@ -0,0 +1,24 @@
+package migrations
+
+import (
+	"context"
+	"database/sql"
+
+	"github.com/pressly/goose/v3"
+)
+
+func init() {
+	goose.AddMigrationContext(Up20201003111749, Down20201003111749)
+}
+
+func Up20201003111749(_ context.Context, tx *sql.Tx) error {
+	_, err := tx.Exec(`
+create index if not exists annotation_starred_at
+	on annotation (starred_at);
+    `)
+	return err
+}
+
+func Down20201003111749(_ context.Context, tx *sql.Tx) error {
+	return nil
+}