CLI option to enable authoring when offline (#2104)

* CLI option to enable authoring when offline

* Update core/service/src/config.rs

Co-Authored-By: arkpar <arkady.paronyan@gmail.com>

substrate/core/cli/src/lib.rs

@@ -470,6 +470,8 @@ where
 		config.telemetry_endpoints = Some(TelemetryEndpoints::new(cli.telemetry_endpoints));
 	}
 
+	config.force_authoring = cli.force_authoring;
+
 	Ok(config)
 }