feat(changelog): add package.json to allow generation of changelog
feat(changelog): add package.json to allow generation of changelog

The tool: https://github.com/conventional-changelog/conventional-changelog-cli allows
generation of the changelog. Once a PR is merged, run the following to generate the changelog:

```
conventional-changelog -p angular -i CHANGELOG.md -s
```

Note that we use the angular commit guidelines:
https://github.com/angular/angular.js/blob/master/CONTRIBUTING.md#commit

paquetgp/mnubo-ios-sdk,mnubo/mnubo-iOS-SDK,paquetgp/mnubo-ios-sdk,mnubo/mnubo-iOS-SDK