fix(serve): correct paths so that --lab works

Author: jthoms1

src/dev-server/serve-config.ts

@@ -15,4 +15,4 @@ export interface ServeConfig {
   useProxy: boolean;
 }
 export const LOGGER_DIR = '__ion-dev-server';
-export const IONIC_LAB_URL = `/${LOGGER_DIR}/ionic_lab.html`;
+export const IONIC_LAB_URL = `/${LOGGER_DIR}/ionic-lab.html`;

src/serve.ts

@@ -51,7 +51,7 @@ export function serve(context?: BuildContext) {
 
 function onReady(config: ServeConfig, context: BuildContext) {
   if (config.launchBrowser || config.launchLab) {
-    const openOptions: string[] = [`http://${config.host}:${config.httpPort}/`]
+    const openOptions: string[] = [`http://${config.host}:${config.httpPort}`]
       .concat(launchLab(context) ? [IONIC_LAB_URL] : [])
       .concat(browserOption(context) ? [browserOption(context)] : [])
       .concat(platformOption(context) ? ['?ionicplatform=', platformOption(context)] : []);