v1.1.0

Changes

• Add the <ParallaxProvider /> component that provides the parallaxController via context to children.
• Update the Usage section of the Readme to document using the new <ParallaxProvider /> component.
• Update the Parallax Controller Context section of the Readme to document accessing the parallaxController via context and the available methods.
• Add warning to update usage if using the old ParallaxController.init() without the <ParallaxProvider /> method.