fix press/release single meta key

Signed-off-by: fufesou <shuanglongchen@yeah.net>

src/lib.rs

@@ -2,6 +2,7 @@
 /// cbindgen:ignore
 pub mod platform;
 mod keyboard;
+pub use keyboard::keycode_to_rdev_key;
 #[cfg(not(any(target_os = "android", target_os = "ios")))]
 pub use platform::{get_cursor, get_cursor_data, get_cursor_pos, start_os_service};
 #[cfg(not(any(target_os = "ios")))]