Bug fixes and improvements
* Standardize local scanning behavior by ikretz in https://github.com/DataDog/guarddog/pull/426
* Eliminate Package class by ikretz in https://github.com/DataDog/guarddog/pull/422
* Bugfix: Adding permissions to traverse extracted files and folders by sobregosodd in https://github.com/DataDog/guarddog/pull/421
* Removing npm-install-script False Positives by sobregosodd in https://github.com/DataDog/guarddog/pull/429
* Expand allowed tar archive compression algorithms by ikretz in https://github.com/DataDog/guarddog/pull/430
* Improve shady-links rule by sobregosodd in https://github.com/DataDog/guarddog/pull/431