Fix the browser node and ensure it doesn't colour the informant output (#6457)

* Fix browser informant

* Fix documentation

* Add an informant_output_format function to the cli config

* Wrap informant output format in an option

* Revert batch verifier

* Remove wasm-timer from primitives io cargo lock

* Drop informant_output_format function

* derive debug for output format

substrate/client/service/test/src/lib.rs

@@ -212,6 +212,7 @@ fn node_config<G: RuntimeGenesis + 'static, E: ChainSpecExtension + Clone + 'sta
 		max_runtime_instances: 8,
 		announce_block: true,
 		base_path: Some(BasePath::new(root)),
+		informant_output_format: Default::default(),
 	}
 }