Replace serde_derive with serde with derive feature

Cargo.lock

@@ -88,7 +88,6 @@ dependencies = [
  "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
  "nix 0.15.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.101 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_derive 1.0.101 (registry+https://github.com/rust-lang/crates.io-index)",
  "toml 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "uinput-sys 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -97,6 +96,9 @@ dependencies = [
 name = "serde"
 version = "1.0.101"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "serde_derive 1.0.101 (registry+https://github.com/rust-lang/crates.io-index)",
+]
 
 [[package]]
 name = "serde_derive"

Cargo.toml

@@ -26,6 +26,5 @@ nix = "0.15.0"
 uinput-sys = "0.1.7"
 getopts = "0.2.21"
 toml = "0.5.3"
-serde_derive = "1.0.101"
-serde = "1.0.101"
+serde = { version = "1.0.101", features = ["derive"] }
 inotify = { version = "0.7.0", default-features = false, features = [] }

src/keymapper.rs

@@ -400,7 +400,7 @@ impl KeyMapper for Key {
 }
 
 use std::path::Path;
-use serde_derive::Deserialize;
+use serde::Deserialize;
 
 #[derive(Deserialize, Debug)]
 pub struct KeymapConfig {