Feature/various improvements (#1282)

* Added abci::Data field to ExecuteResult

* optional serde support for ed25519 keys

* optional serde support for x25519 keys

* actually calling dotenv at validator API startup

* Added STATE_DENOM network specific constant

* unit test fixes

validator-api/src/main.rs

@@ -590,6 +590,8 @@ async fn run_validator_api(matches: ArgMatches<'static>) -> Result<()> {
 async fn main() -> Result<()> {
     println!("Starting validator api...");
 
+    dotenv::dotenv()?;
+
     cfg_if::cfg_if! {if #[cfg(feature = "console-subscriber")] {
         // instriment tokio console subscriber needs RUSTFLAGS="--cfg tokio_unstable" at build time
         console_subscriber::init();