upgrade typescript to 4x

- fix a few types that it now cares about around promises
reconbot · Jan 15, 2021 · ca095f7 · ca095f7
1 parent f184ef4
commit ca095f7
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Showing 4 changed files with 4 additions and 4 deletions.
diff --git a/lib/from-stream.ts b/lib/from-stream.ts
@@ -5,7 +5,7 @@ export interface ReadableStreamish {
 }
 
 async function onceReadable(stream: ReadableStreamish) {
-  return new Promise(resolve => {
+  return new Promise<void>(resolve => {
     stream.once('readable', () => {
       resolve()
     })

diff --git a/lib/parallel-merge.ts b/lib/parallel-merge.ts
@@ -26,7 +26,7 @@ export async function* parallelMerge<I extends AnyIterable<any>[]>(
     }
   }
 
-  const waitForQueue = () =>
+  const waitForQueue = (): Promise<void> =>
     new Promise((resolve, reject) => {
       if (lastError) {
         reject(lastError)

diff --git a/lib/util-test.ts b/lib/util-test.ts
@@ -7,7 +7,7 @@ export async function asyncStringArr(str) {
 }
 
 export function promiseImmediate<T>(data?: T) {
-  return new Promise(resolve => setImmediate(() => resolve(data))) as Promise<T>
+  return new Promise<undefined | T>(resolve => setImmediate(() => resolve(data))) as Promise<T>
 }
 
 export async function delayTicks<T>(count = 1, data?: T) {

diff --git a/package.json b/package.json
@@ -59,7 +59,7 @@
     "tslint": "^6.1.2",
     "tslint-config-prettier": "^1.18.0",
     "tslint-plugin-prettier": "^2.3.0",
-    "typescript": "3.9.7"
+    "typescript": "4.1.3"
   },
   "engines": {
     "node": ">=10"