[windows] Attempt to use tput to clear the screen

In some situations, this may clear the screen better than a call to
`cls`, and in all other cases `cls` is called anyway.

May help #99

src/cli.rs

@@ -28,7 +28,10 @@ pub struct Args {
 
 #[cfg(target_family = "windows")]
 pub fn clear_screen() {
-    let _ = Command::new("cmd").arg("/c").arg("cls").status();
+    let _ = Command::new("cmd")
+        .arg("/c")
+        .arg("tput reset || cls")
+        .status();
 }
 
 #[cfg(target_family = "unix")]