Support iOS 9 target

[owdax]

Summary

Added Support for iOS 9 target (for projects that have min iOS 9 target and can't use PanModal)

Requirements (place an x in each [ ])

• [x] I've read and understood the Contributing Guidelines and have done my best effort to follow them.

• [x] I've read and agree to the Code of Conduct.

• [ ] I've written tests to cover the new code and functionality included in this PR.

[CLAassistant]

All committers have signed the CLA.

[sumitsumanclip]

it will be nice if we can get a clarification from the owner of the this Library, whether the support for ios 9 will be taken into the consideration or not. We also need to use this library as well need to support ios 9 in our App, so please give us some sign that we can able to use this library directly from the main repo. Thanks

[owdax]

@ste57 Could you please review this PR, thanks

[ste57]

Hi @omiddlk

I'd recommend merging this on a fork as we're not looking to support iOS 9 publicly

[sumitsumanclip]

Hi @omiddlk will you be making a fork ? please mention me in your PR if you make it. Thanks