Add LTO and use a termion fork with serde support

Cargo.lock

@@ -1454,14 +1454,14 @@ dependencies = [
 
 [[package]]
 name = "termion"
-version = "1.5.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c22cec9d8978d906be5ac94bceb5a010d885c626c4c8855721a4dbd20e3ac905"
+version = "1.6.0"
+source = "git+https://gitlab.com/TheLostLambda/termion.git#70159e07c59c02dc681db3b38dea16c295610ffa"
 dependencies = [
  "libc",
  "numtoa",
  "redox_syscall",
  "redox_termios",
+ "serde",
 ]
 
 [[package]]

Cargo.toml

@@ -18,7 +18,7 @@ serde_yaml = "0.8"
 signal-hook = "0.1.10"
 strip-ansi-escapes = "0.1.0"
 structopt = "0.3"
-termion = "1.5.5"
+termion = { git = "https://gitlab.com/TheLostLambda/termion.git", features = ["serde"] }
 termios = "0.3"
 unicode-truncate = "0.1.1"
 unicode-width = "0.1.8"
@@ -32,3 +32,6 @@ features = ["unstable"]
 
 [dev-dependencies]
 insta = "0.16.1"
+
+[profile.release]
+lto = true

src/main.rs

@@ -469,7 +469,7 @@ pub fn start(mut os_input: Box<dyn OsApi>, opts: Opt) {
                             let handle_key = instance.exports.get_function("handle_key").unwrap();
                             for key in input_bytes.keys() {
                                 if let Ok(key) = key {
-                                    dbg!(key);
+                                    dbg!(serde_json::to_string(&key));
                                 }
                             }
                         }