Already fixed

The real test cases are very carefully written so that the point will never lie on the exact edge. It is possible that your browser is displaying it incorrectly if that's what you're seeing.a

with input "[ [ -1, -1 ], [ 9, -1 ], [ 4, 9 ] ], [ 1, -3 ]", The point is obvious outside the polygon, But it said it should be inside?

What test is that? There's only one quadrilateral test, and it's a square from [-5, -5] to [5, 5].