Return Key::Tab instead of \t on windows (#182)

Author: Gordon01

src/windows_term/mod.rs

@@ -390,6 +390,8 @@ pub fn read_single_key() -> io::Result<Key> {
                 // a special keycode for `Enter`, while ReadConsoleInputW() prefers to use '\r'.
                 if c == '\r' {
                     Ok(Key::Enter)
+                } else if c == '\t' {
+                    Ok(Key::Tab)
                 } else if c == '\x08' {
                     Ok(Key::Backspace)
                 } else if c == '\x1B' {