Fix stroke not being drawn properly

[phamfoo]

SVG only supports center stroke, but we want the stroke to stay inside the shape. At the moment, we work around this by drawing a slightly smaller path so that the stroke can fit inside. This solution, however, has some issues:

• As addressed in https://github.com/tienphaw/react-native-figma-squircle/pull/9, width/height could negative.
• We're using the same radius to draw the inner path, which means when the stroke is applied, the outer radius will appear larger.

Changes in this PR

• Add a Rect component that helps provide the width/height of the SquircleView.
• Double the stroke width remove the outer part with a ClipPath, this also removes the need to recalculate a new width/height/radius.

[phamfoo]

Hey @Krisztiaan I added you as a collaborator to this repo, still interested in reviewing this PR?

[phamfoo]

Thanks for the review @Krisztiaan 🙏, I'm merging this and cutting a new release soon.