Avoid sending heartbeat if we are already considered online. (#3981)

* Don't send a heartbeat if already online.

* Remove env_logger.

* Update lock.

* Bump runtime.

* Merge master

substrate/node/runtime/src/lib.rs

@@ -81,7 +81,7 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
 	// and set impl_version to equal spec_version. If only runtime
 	// implementation changes and behavior does not, then leave spec_version as
 	// is and increment impl_version.
-	spec_version: 191,
+	spec_version: 192,
 	impl_version: 191,
 	apis: RUNTIME_API_VERSIONS,
 };