Fix negative string size (or size too big) error

What's Changed

• Fixing ArgumentError (negative string size (or size too big)) error by @AjitKonde-Pattern in #3
• Replaced fetch_all with fetch by @AjitKonde-Pattern in #4

New Contributors

• @AjitKonde-Pattern made their first contribution in #3

Full Changelog: v6.0.1...v6.0.2