LOW-635: fix plot saving
plt.savefig() fails when the `figsize` argument is present, so this removes it. This change also allows you to specify filetypes that aren't .png by including an extension in the --output argument.
plt.savefig() fails when the `figsize` argument is present, so this removes it. This change also allows you to specify filetypes that aren't .png by including an extension in the --output argument.