const readFileBufferPromise = promisify1<string, Buffer>(readFile)
const unlinkPromise = promisify1WithVoid<string>(unlink)
const renamePromise = promisify2WithVoid<string, string>(rename)
-const writeFilePromise = promisify2<string, any, void>(writeFile)
+const writeFilePromise = promisify2WithVoid<string, any>(writeFile)
const readdirPromise = promisify1<string, string[]>(readdir)
const mkdirpPromise = promisify1<string, string>(mkdirp)
const pseudoRandomBytesPromise = promisify1<number, Buffer>(pseudoRandomBytes)