Async rewrite

Cargo.toml

@@ -4,7 +4,7 @@ description = "Idiomatic MPRIS D-Bus interface library"
 version = "3.0.0-alpha1"
 license = "Apache-2.0"
 edition = "2021"
-rust-version = "1.56"
+rust-version = "1.75"
 authors = ["Magnus Bergmark <magnus.bergmark@gmail.com>"]
 repository = "https://github.com/Mange/mpris-rs"
 readme = "README.md"
@@ -18,12 +18,11 @@ maintenance = { status = "actively-developed" }
 # Enable zbus' tight tokio integration; in case you want to use this crate in a
 # Tokio-based app.
 tokio = ["zbus/tokio"]
-# Enable serde support for metadata
-serde = ["dep:serde"]
 
 [dependencies]
-zbus = "3.4.0"
-serde = { version = "1.0.164", optional = true }
+zbus = "4.4.0"
+serde ="1.0.164"
+futures-util = "0.3.31"
 
 # Example dependencies
 [dev-dependencies]

clippy.toml

@@ -1 +1,2 @@
 allow-private-module-inception = true
+allow-unwrap-in-tests = true

examples/list_players.rs

@@ -1,10 +1,9 @@
-use mpris::Mpris;
-use std::error::Error;
+use mpris::{Mpris, MprisError};
 
 #[async_std::main]
-async fn main() -> Result<(), Box<dyn Error>> {
+async fn main() -> Result<(), MprisError> {
     let mpris = Mpris::new().await?;
-    for player in mpris.players().await? {
+    for player in mpris.all_players().await? {
         println!("{:?}", player);
     }
     Ok(())

examples/metadata.rs

@@ -1,12 +1,11 @@
-use mpris::{Mpris, Player};
-use std::error::Error;
+use mpris::{Mpris, MprisError, Player};
 
 #[async_std::main]
-async fn main() -> Result<(), Box<dyn Error>> {
+async fn main() -> Result<(), MprisError> {
     let mpris = Mpris::new().await?;
     let mut total = 0;
 
-    for player in mpris.players().await? {
+    for player in mpris.all_players().await? {
         print_metadata(player).await?;
         total += 1;
     }
@@ -18,7 +17,7 @@ async fn main() -> Result<(), Box<dyn Error>> {
     Ok(())
 }
 
-async fn print_metadata(player: Player<'_>) -> Result<(), Box<dyn Error>> {
+async fn print_metadata(player: Player) -> Result<(), MprisError> {
     println!(
         "Player: {} ({})",
         player.identity().await?,