Remove unnecessary keyword this from functions

[wlsf82]

Also, update the changelog and package patch version.

Pull Request Checklist

- [x] Have you followed the steps in our [Contributing](https://github.com/wlsf82/protractor-helper/blob/master/docs/CONTRIBUTING.md) document?
- [x] Have you checked to ensure there aren't other open [Pull Requests](https://github.com/wlsf82/protractor-helper/pulls) for the same update/change?
- [x] Have you successfully ran tests with your changes locally?
- [-] Have you written new tests for your changes, if necessary?
- [x] Have you added an explanation of what your changes do and why you'd like us to include them?
- [-] Have you made improvements to the documentation, if necessary? ([docs/](https://github.com/wlsf82/protractor-helper/tree/master/docs) folder and [README.md](https://github.com/wlsf82/protractor-helper/blob/master/README.md))
- [-] Have you linked the correct [GitHub issue](https://github.com/wlsf82/protractor-helper/issues), if there is any?

> Pull requests that do not pass the automated tests on [SemaphoreCI](http://semaphoreci.com) and the code quality verification on [Better Code Hub](https://bettercodehub.com/) will not be reviewed

[wlsf82]

@PauloGoncalvesBH, would you mind reviewing this PR, please?

[PauloGoncalvesBH]

PR approved :)