PHP-SDK - 3.2.0

## 3.2.0
August 28th, 2019

### New Features:
* Added support for datafile management via [HTTPProjectConfigManager](
* The [HTTPProjectConfigManager]( is an implementation of the [ProjectConfigManagerInterface](
* Users will have to initialize and pass in the config manager to be able to use it:
$configManager = new HTTPProjectConfigManager(<>);
$optimizely = new Optimizely(<>, null, null, null, false, null, $configManager);
* The `fetch` method allows you to refresh the config. In order to update the config, you can do something like: