Fix border properties on Image component

[brunolemos]

For some reason, if we transform some border properties, it doesn't work on Image. But if we don't transform, it still works everywhere.

const AvatarImage = styled.Image`
  width: ${({ size }) => size};
  height: ${({ size }) => size};
  background-color: black;
  border-radius: 4;
  border-color: red;
  border-width: 5;
`;

const AvatarView = styled.View`
  width: ${({ size }) => size};
  height: ${({ size }) => size};
  background-color: black;
  border-radius: 4;
  border-color: red;
  border-width: 5;
`;

[jacobp100]

Hi! I've actually been putting the workarounds here! At some point, I'm going to try and fix the behaviour in RN.

[jacobp100]

Although thinking about it, maybe we could add property blacklisting to the API here for when we do need to work around these things.

[jacobp100]

See #16. But thanks anyway!