Update wallpaper.py

Add support for hsetroot to change wallpaper.

Author: plasmoduck

pywal/wallpaper.py

@@ -65,6 +65,9 @@ def set_wm_wallpaper(img):
     elif shutil.which("xwallpaper"):
         util.disown(["xwallpaper", "--zoom", img])
 
+    elif shutil.which("hsetroot"):
+        util.disown(["hsetroot", "-fill", img])
+      
     elif shutil.which("nitrogen"):
         util.disown(["nitrogen", "--set-zoom-fill", img])