Installation via NPM won't work

Running 
```
npm install eslint-plugin-checked-exceptions --save-dev   
```
results in
```
npm ERR! code E404
npm ERR! 404 Not Found - GET https://registry.npmjs.org/eslint-plugin-checked-exceptions - Not found
npm ERR! 404 
npm ERR! 404  'eslint-plugin-checked-exceptions@*' is not in this registry.
```