silence some new ts squigglies in the editor (#3435)

packages/cli/src/lib/bundler/server.ts

@@ -60,7 +60,7 @@ export async function serveBundle(options: ServeOptions) {
     proxy: pkg.proxy,
   });
 
-  await new Promise((resolve, reject) => {
+  await new Promise<void>((resolve, reject) => {
     server.listen(port, url.hostname, (err?: Error) => {
       if (err) {
         reject(err);

packages/cli/src/lib/run.ts

@@ -102,7 +102,7 @@ export async function waitForExit(
     return;
   }
 
-  await new Promise((resolve, reject) => {
+  await new Promise<void>((resolve, reject) => {
     child.once('error', error => reject(error));
     child.once('exit', code => {
       if (code) {