Prepare 4.2.0 (Alamofire#441)

* Version to 4.2.0.

* Update Jazzy docs.

Prepare 4.1 (Alamofire#414)

* Version to 4.1.0.

* Update Jazzy docs.

Prepare 4.0.3. (Alamofire#408)

* Version to 4.0.3.

* Update Jazzy docs.

Prepare 4.0.2 (Alamofire#404)

* Version to 4.0.2.

* Update Jazzy docs.

Prepare 4.0.1 (Alamofire#402)

* Version to 4.0.1.

* Update Jazzy docs.

Updated dependency management files to pick up AF 5.0.1 at a minimum (A…

…lamofire#399)

Prepare 4.0.0-beta.6 (Alamofire#388)

* Update version, CHANGELOG.

* Update Jazzy docs.

Fix release date.

Another CHANGELOG fix.

Release - AFI 4.0.0-beta.4 Prep (Alamofire#373)

* Updated gems to their latest versions

* Bumped the version and added release notes to the CHANGELOG

* Updated the jazzy docs