Version 0.7 causes segmentation fault with jest

I have a setup test file where I create a new database and run the migrations within a `beforeAll` block. With `0.6.0` it runs fine but with `0.7.0` it throws `SIGSEGV`.

I'm running node version `15.11.0`

```typescript
import "dotenv/config";

import { execSync } from "child_process";
import { up as migrate } from "ley";
import { nanoid } from "nanoid";

const database = (process.env.PGDATABASE = `test_${nanoid()}`);

beforeAll(async () => {
execSync(`createdb ${database}`);
await migrate({
dir: "migrations",
driver: "postgres",
});
});

afterAll(() => {
execSync(`dropdb ${database}`);
});

```

Reproduce the shown Jest setup test with Node 15.11.0, comparing ley 0.6.0 and 0.7.0 while using the postgres driver and migrations directory. Inspect the migration execution path around the beforeAll callback and verify that migrations complete without SIGSEGV and the database can be removed afterward.

Written by the indexing model from the issue text.