extended faucetDispatch to report completion of the initial build

this allows independent API consumers to perform operations at the end
of the pipeline

Author: FND

lib/index.js

@@ -36,7 +36,7 @@ module.exports = async function faucetDispatch(referenceDir, config,
 			then(buildStep(buckets.scripts.concat(buckets.styles))).
 			then(buildStep(buckets.markup));
 	});
-	runner.run();
+	let res = runner.run();
 
 	if(watch) {
 		makeWatcher(config.watchDirs, referenceDir).
@@ -53,6 +53,8 @@ module.exports = async function faucetDispatch(referenceDir, config,
 	} else if(liveserve) {
 		server.live(liveserve, assetManager.manifest.webRoot);
 	}
+
+	return res; // notifies consumers once the initial build has completed
 };
 
 function buildStep(plugins) {