added better errors handler & log's !
1. [Better error handler on_cmd](https://github.com/Abishnoi69/Abg/commit/274f38c62841834f69601d2fdfc8e074c6725736)
2. [better error habdler on_cb](https://github.com/Abishnoi69/Abg/commit/18ed080342326c6cfa2a4b6991ee9a69101298e0)
3. [update example](https://github.com/Abishnoi69/Abg/commit/fe44611c5b429b93dce29bd79d99e3a350ed11ed)
4. [better logging](https://github.com/Abishnoi69/Abg/commit/75a8cdf9dc37216c5cbeb058b5754a020bc10084)
**Full Changelog**: https://github.com/Abishnoi69/Abg/compare/v2.3...v2.3.1