feat(cli): update to TypeScript 4.1 (#7573)

4 files changed, 6 insertions, 6 deletions

diff --git a/cli/tests/unit/globals_test.ts b/cli/tests/unit/globals_test.ts
index 4fd531b25..988e6a9df 100644
--- a/cli/tests/unit/globals_test.ts
+++ b/cli/tests/unit/globals_test.ts
@@ -131,13 +131,13 @@ unitTest(async function windowQueueMicrotask(): Promise<void> {
   let resolve1: () => void | undefined;
   let resolve2: () => void | undefined;
   let microtaskDone = false;
-  const p1 = new Promise((res): void => {
+  const p1 = new Promise<void>((res): void => {
     resolve1 = (): void => {
       microtaskDone = true;
       res();
     };
   });
-  const p2 = new Promise((res): void => {
+  const p2 = new Promise<void>((res): void => {
     resolve2 = (): void => {
       assert(microtaskDone);
       res();
diff --git a/cli/tests/unit/net_test.ts b/cli/tests/unit/net_test.ts
index 8eaabdbba..6165e77f6 100644
--- a/cli/tests/unit/net_test.ts
+++ b/cli/tests/unit/net_test.ts
@@ -327,7 +327,7 @@ unitTest(
     const listener = Deno.listen(addr);
     iterate(listener);
 
-    await new Promise((resolve: () => void, _) => {
+    await new Promise<void>((resolve) => {
       setTimeout(resolve, 100);
     });
     const conn1 = await Deno.connect(addr);
diff --git a/cli/tests/unit/test_util.ts b/cli/tests/unit/test_util.ts
index 672c7defc..6163865de 100644
--- a/cli/tests/unit/test_util.ts
+++ b/cli/tests/unit/test_util.ts
@@ -188,14 +188,14 @@ export function unitTest(
 }
 
 export interface ResolvableMethods<T> {
-  resolve: (value?: T | PromiseLike<T>) => void;
+  resolve: (value: T | PromiseLike<T>) => void;
   // deno-lint-ignore no-explicit-any
   reject: (reason?: any) => void;
 }
 
 export type Resolvable<T> = Promise<T> & ResolvableMethods<T>;
 
-export function createResolvable<T>(): Resolvable<T> {
+export function createResolvable<T = void>(): Resolvable<T> {
   let methods: ResolvableMethods<T>;
   const promise = new Promise<T>((resolve, reject): void => {
     methods = { resolve, reject };
diff --git a/cli/tests/unit/timers_test.ts b/cli/tests/unit/timers_test.ts
index 2d69ddb44..af876b742 100644
--- a/cli/tests/unit/timers_test.ts
+++ b/cli/tests/unit/timers_test.ts
@@ -8,7 +8,7 @@ import {
 } from "./test_util.ts";
 
 function waitForMs(ms: number): Promise<number> {
-  return new Promise((resolve: () => void): number => setTimeout(resolve, ms));
+  return new Promise((resolve): number => setTimeout(resolve, ms));
 }
 
 unitTest(async function timeoutSuccess(): Promise<void> {