Using `LineSpec` input argument to change the line format isn't working. ``` [X,Y,Z] = peaks; contourf(X,Y,Z,'--') fig2plotly(gcf, 'offline', false); ``` The previous code should plot a filled contour with dashed lines, however, is plotting regular solid lines. Expected and generated (https://chart-studio.plotly.com/~xarico10/709/#/) plots: <img width="512" alt="Captura de Pantalla 2021-07-31 a la(s) 12 36 30 p m" src="https://user-images.githubusercontent.com/87881895/127748068-b499e7c9-80b1-4cd5-81de-d2e473244197.png"> <img width="769" alt="Captura de Pantalla 2021-07-31 a la(s) 12 36 39 p m" src="https://user-images.githubusercontent.com/87881895/127748070-e86b5cc8-22d6-47a5-8f28-19266bade0b6.png"> Examples on using `LineSpec` can be found on: https://www.mathworks.com/help/matlab/ref/contourf.html#mw_30a9c816-90e5-4ab8-a7a0-11675e85a091