What's Changed
* Fixes grammar for error output message in cli.py by erickdacohen in https://github.com/NatLee/HEIC2PNG/pull/1
New Contributors
* erickdacohen made their first contribution in https://github.com/NatLee/HEIC2PNG/pull/1
**Full Changelog**: https://github.com/NatLee/HEIC2PNG/compare/v1.0.0...v1.0.1