fix(macos): don't panic if Request can't be constructed (#1554)

Author: Agile86

src/wkwebview/class/wry_web_view_delegate.rs

@@ -58,7 +58,12 @@ define_class!(
             CStr::from_ptr(url_utf8).to_str(),
             CStr::from_ptr(js_utf8).to_str(),
           ) {
-            ipc_handler(Request::builder().uri(url).body(js.to_string()).unwrap());
+            if let Ok(r) = Request::builder().uri(url).body(js.to_string()) {
+              ipc_handler(r);
+            } else {
+              #[cfg(feature = "tracing")]
+              tracing::warn!("WebView received invalid IPC request: {}", js);
+            }
             return;
           }
         }