* Add remote request methods to `FileSystem` class
* Add `Updater` class
* Fix extraction path in `Updater` class
* Merge branch 'master' into feature/updater
* Fix coding style with PHP-CS-Fixer
* Update .gitignore
* Add `cleanupAfterInstall` option to `Updater` class
* Add `Updater::latestRelease()` method
* Use `version_compare()` to check if Formwork is up-to-date
* Use more specific exception classes in `Updater`
* Update language strings
* Add `Updates` controller
* Add Options > Updates tab
* Fix incorrect version name displayed after update
* Rename `FileSystem::retrieve()` to `FileSystem::fetch()`
* Fix wrong function calls
* Use `Registry` object in `Updater` class
* Move archive URI in `Updater::$release` property
* Fix code to work after last merge commit
* Fix coding style with PHP-CS-Fixer
* Cleanup code