Goblin: fix macOS build, import objc sel_impl for the deep-link bridge

objc 0.2's sel!/msg_send! macros expand to sel_impl!, which has to be in
scope. The cfg(target_os = macos) apple-events module never compiles on
Linux, so local cargo check missed it and only macOS CI caught it.

src/lib.rs

@@ -416,7 +416,7 @@ pub fn on_data(data: String) {
 mod mac_deeplink {
 	use objc::declare::ClassDecl;
 	use objc::runtime::{Object, Sel};
-	use objc::{class, msg_send, sel};
+	use objc::{class, msg_send, sel, sel_impl};
 	use std::ffi::CStr;
 	use std::os::raw::c_char;
 	use std::sync::Once;