[lafere-api] add Client::closed and Requestor::closed

Author: soerenmeier

lafere-api/src/client.rs

@@ -126,6 +126,10 @@ where
 }
 
 impl<A, B> Client<A, B> {
+	pub async fn closed(&mut self) {
+		self.inner.closed().await
+	}
+
 	pub async fn close(self) -> Result<(), TaskError> {
 		self.inner.close().await
 	}

lafere-api/src/requestor.rs

@@ -22,6 +22,10 @@ impl<A, B> Requestor<A, B> {
 	pub fn is_closed(&self) -> bool {
 		self.inner.is_closed()
 	}
+
+	pub async fn closed(&self) {
+		self.inner.closed().await
+	}
 }
 
 impl<A, B> Requestor<A, B>