Prepare 4.3.0 (#470)

* Update CHANGELOG.

* Match Alamofire default.

* Update Gems.

* Update version.

* Update Jazzy docs.

Prepare 4.2.0 (#441)

* Version to 4.2.0.

* Update Jazzy docs.

Prepare 4.1 (#414)

* Version to 4.1.0.

* Update Jazzy docs.

Prepare 4.0.3. (#408)

* Version to 4.0.3.

* Update Jazzy docs.

Prepare 4.0.2 (#404)

* Version to 4.0.2.

* Update Jazzy docs.

Prepare 4.0.1 (#402)

* Version to 4.0.1.

* Update Jazzy docs.

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

…399)

Prepare 4.0.0-beta.6 (#388)

* Update version, CHANGELOG.

* Update Jazzy docs.

Fix release date.

Another CHANGELOG fix.