Fix compilation error without lobby feature

Cargo.toml

@@ -28,7 +28,7 @@ rcon = ["rust_rcon", "async-std"]
 
 # Lobby support
 # Add lobby join method, keeps client in fake lobby world until server is ready.
-lobby = ["named-binary-tag", "quartz_nbt", "uuid"]
+lobby = ["md-5", "named-binary-tag", "quartz_nbt", "uuid"]
 
 [dependencies]
 anyhow = "1.0"
@@ -42,7 +42,6 @@ dotenv = "0.15"
 flate2 = { version = "1.0", default-features = false, features = ["default"] }
 futures = { version = "0.3", default-features = false, features = ["executor"] }
 log = "0.4"
-md-5 = "0.9"
 minecraft-protocol = { git = "https://github.com/timvisee/rust-minecraft-protocol", rev = "356ea54" }
 notify = "4.0"
 pretty_env_logger = "0.4"
@@ -61,6 +60,7 @@ rust_rcon = { package = "rcon", version = "0.5.2", optional = true }
 async-std = { version = "1.9.0", deafult-features = false, optional = true }
 
 # Feature: lobby
+md-5 = { version = "0.9", optional = true }
 named-binary-tag = { version = "0.6", optional = true }
 quartz_nbt = { version = "0.2", optional = true }
 uuid = { version = "0.7", optional = true, features = ["v3"] }

src/mc/mod.rs

@@ -2,6 +2,7 @@ pub mod ban;
 #[cfg(feature = "rcon")]
 pub mod rcon;
 pub mod server_properties;
+#[cfg(feature = "lobby")]
 pub mod uuid;
 
 /// Minecraft ticks per second.