Fixed unhelpful error message when running migrations

When the migration SQL code is missing a `;`, we  get
an error regarding an unexpected `INSERT INTO`. The user will
be confused when the migration isn't even containing any `INSERT TO`
calls at all.

To fix this we terminate the current statement by force adding a `;`

IHP/SchemaMigration.hs

@@ -41,7 +41,7 @@ runMigration migration@Migration { revision, migrationFile } = do
 
     let fullSql = [trimming|
         BEGIN;
-            ${migrationSql}
+            ${migrationSql};
             INSERT INTO schema_migrations (revision) VALUES (?);
         COMMIT;
     |]