fix(migration): disable foreign keys for spec version migration

migrations/sqlite/0000005_spec_version.up.sql

@@ -1,4 +1,6 @@
 -- Add unique constraint on name/version to specs
+PRAGMA foreign_keys = 0;
+
 ALTER TABLE specs
 RENAME TO _specs;
 
@@ -33,4 +35,6 @@ SELECT
 FROM
     _specs;
 
-DROP TABLE _specs;
+DROP TABLE _specs;
+
+PRAGMA foreign_keys = 1;