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/node/cli/src/service.rs

@@ -97,6 +97,7 @@ construct_service_factory! {
 						service.network(),
 						service.on_exit(),
 						service.config.custom.inherent_data_providers.clone(),
+						service.config.force_authoring,
 					)?);
 
 					info!("Running Grandpa session as Authority {}", key.public());