fix(line): hide when length subpath is zero

[SaidMarar]

This fix #133

As mentioned in MDN: stroke-linecap it is the expected behavior of svg stroke-linecap for both round and square.

The round value indicates that at the end of each subpath the stroke will be extended by a half circle with a diameter equal to the stroke width. On a zero length subpath, the stroke consists of a full circle centered at the subpath's point.

The square value indicates that at the end of each subpath the stroke will be extended by a rectangle with a width equal to half the width of the stroke and a height equal to the width of the stroke. On a zero length subpath, the stroke consists of a square with its width equal to the stroke width, centered at the subpath's point.

[vercel]

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Name	Status	Preview	Updated
progress	❌ Failed (Inspect)		Dec 29, 2022 at 11:35AM (UTC)