React Native 0.40 support

According to https://github.com/facebook/react-native/releases/tag/v0.40.0,

Native code on iOS must refer to headers out of the react namespace. Previously the following would work:

#import "RCTUtils.h"

But now all headers have been moved:

#import <React/RCTUtils.h>

As far as it's a breaking change, I bumped the version to 2.0.

Peace ✌️

[iOS] Border radius

From now on, borderRadius property should work for BlurView and VibrancyView on iOS

Blur radius

Hey everybody.

It's been a while since the last meaningful release (with Android blur support). Today, I want to share with your one feature, that has been proposed by @jakehasler. I've seen many people were asking for a blur radius (amount) property. Unfortunately, currently I'm a bit busy with my other projects/self-education, so I left it up to the community and... Few days ago @jakehasler made a PR that introduce a new blurAmount property to iOS users and I was pleased to merge it!

In a case you want to take a look on the PR:
#102

Best,
Alexey