I'm trying to change the thickness of the marker "x" when using scatter, but I found the "linewidths" parameter doesn't work for Matplotlib version 3.1.0.
But when I switch to Matplotlib version 1.3.1, "linewidths" parameter works well. Why? Is there something changed in newer version?
This is my code.

import matplotlib.pyplot as plt
import numpy as np
import matplotlib
print(matplotlib.__version__)
x = y = np.arange(5)

fig,ax = plt.subplots(1)

ax.scatter(x,y,  s=100,marker='x',color='b',linewidths=1)
ax.scatter(x,y+1,s=100,marker='x',color='r',linewidths=2)
ax.scatter(x,y+2,s=100,marker='x',color='g',linewidths=3)

plt.show()

This is the figure output by Matplotlib 3.1.0.

This is the figure output by Matplotlib 1.3.1.