v1.5.1

1. Implemented new options parameter to customize the behavior.
2. Added support for exclude array, to ignore specific error codes.
3. Added enable4xx, sound4xx, enable5xx, sound5xx into the
   options parameters to control error classes with just one setting.

v1.4.0

1. Notification template made less cluttered

v1.3.0

1. Add response statusCode to emoji mapper to make it more readable

Update README.md

1. Improve README.md to make it more readable.

First release

First release!