Bump version to 4.0.7

Improvements and fixes:

- Lookup API does not return anything
- Requirement check closure is called too many times
- Extension to simplify adding requirements

Merge pull request #45 from infinum/feature/privacy-info

Add privacy manifest

v4.0.3

* Increased min deployment target from iOS 8 to iOS 11, and macOS 10.10 to macOS 10.13

v4.0.2

4.0.1

**Fixed**

* Requirement check closure is called only once
* `requiredOSVersion` is optional

v4.0.0

* It is possible to define multiple configuration for the same platform
* Appropriate configuration will be chosen based on the requirements - if defined in JSON
* Support for the new JSON formatting
* Both checkForUpdates and loadConfiguration methods are now unified in one method checkForUpdates. loadConfiguration method is removed
* New UpdateResult return type is added to conform new JSON
* Added parameter notificationFrequency to checkForUpdateFromAppStore method which is used for setting desired update notification frequency.

For all changes, please check: https://github.com/infinum/iOS-prince-of-versions/blob/master/PoV%204.0%20Migration%20Guide.md

v3.0.0

* Added support for checking the version info from the App Store
* Added support for the module stability
* Added support for defining the callback queue
* Added support for Carthage and Swift package

Config fix