Introduce Flaming Fir testnet (#2526)

* node: replace emberic elm with flaming fir testnet

* update readme

substrate/node/cli/src/lib.rs

@@ -37,8 +37,8 @@ pub enum ChainSpec {
 	Development,
 	/// Whatever the current runtime is, with simple Alice/Bob auths.
 	LocalTestnet,
-	/// The Emberic Elm testnet.
-	EmbericElm,
+	/// The Flaming Fir testnet.
+	FlamingFir,
 	/// Whatever the current runtime is with the "global testnet" defaults.
 	StagingTestnet,
 }
@@ -47,7 +47,7 @@ pub enum ChainSpec {
 impl ChainSpec {
 	pub(crate) fn load(self) -> Result<chain_spec::ChainSpec, String> {
 		Ok(match self {
-			ChainSpec::EmbericElm => chain_spec::emberic_elm_config()?,
+			ChainSpec::FlamingFir => chain_spec::flaming_fir_config()?,
 			ChainSpec::Development => chain_spec::development_config(),
 			ChainSpec::LocalTestnet => chain_spec::local_testnet_config(),
 			ChainSpec::StagingTestnet => chain_spec::staging_testnet_config(),
@@ -58,7 +58,7 @@ impl ChainSpec {
 		match s {
 			"dev" => Some(ChainSpec::Development),
 			"local" => Some(ChainSpec::LocalTestnet),
-			"" | "elm" | "emberic-elm" => Some(ChainSpec::EmbericElm),
+			"" | "fir" | "flaming-fir" => Some(ChainSpec::FlamingFir),
 			"staging" => Some(ChainSpec::StagingTestnet),
 			_ => None,
 		}