Round 3d line data to stabilize tests

Author: kMutagene

tests/Plotly.NET.Tests/HtmlCodegen/Charts3D.fs

@@ -39,6 +39,10 @@ let lineChart =
             let i' = float i 
             let r = 10. * Math.Cos (i' / 10.)
             (r * Math.Cos i', r * Math.Sin i', i')
+            |> fun (x,y,z) -> 
+                Math.Round(x,3),
+                Math.Round(y,3),
+                Math.Round(z,3)
         )
         |> List.unzip3