feat(router): include git commit hash and timestamp in --version output (#29)

crates/router/src/build.rs

@@ -0,0 +1,3 @@
+fn main() {
+    router_env::vergen::generate_cargo_instructions();
+}

crates/router/src/configs/settings.rs

@@ -11,6 +11,7 @@ use crate::{
 };
 
 #[derive(StructOpt, Default)]
+#[structopt(version = router_env::version!())]
 pub struct CmdLineConf {
     /// Config file.
     /// Application will look for "config/config.toml" if this option isn't specified.