make player backend a generic trait

musicdb-lib/Cargo.toml

@@ -3,16 +3,15 @@ name = "musicdb-lib"
 version = "0.1.0"
 edition = "2021"
 
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
-
 [dependencies]
-awedio = { version = "0.2.0", optional = true }
-base64 = "0.21.2"
+base64 = "0.22.1"
 colorize = "0.1.0"
 rand = "0.8.5"
 rc-u8-reader = "2.0.16"
-sysinfo = "0.30.5"
-tokio = { version = "1.29.1", features = ["sync"] }
+rodio = { version = "0.18.0", optional = true }
+sysinfo = "0.30.12"
+tokio = { version = "1.37.0", features = ["sync"] }
 
 [features]
-playback = ["awedio"]
+default = ["playback"]
+playback = ["dep:rodio"]