add p-defer typings (#13597)

p-defer/index.d.ts

@@ -0,0 +1,14 @@
+// Type definitions for p-defer 1.0
+// Project: https://github.com/sindresorhus/p-defer
+// Definitions by: Sam Verschueren <https://github.com/SamVerschueren>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+interface DeferredPromise<T> {
+	resolve<U>(value: U | PromiseLike<U>): Promise<U>;
+	reject(reason: any): Promise<never>;
+	promise: Promise<T>;
+}
+
+declare function pDefer<T>(): DeferredPromise<T>;
+
+export = pDefer;

p-defer/p-defer-tests.ts

@@ -0,0 +1,10 @@
+import pDefer = require('p-defer');
+
+function delay(ms: number) {
+    const deferred = pDefer<string>();
+    setTimeout(deferred.resolve, ms, '🦄');
+    return deferred.promise;
+}
+
+let s: string;
+async function f() { s = await delay(100); }

p-defer/tsconfig.json

@@ -0,0 +1,20 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "target": "es6",
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "p-defer-tests.ts"
+    ]
+}

p-defer/tslint.json

@@ -0,0 +1 @@
+{ "extends": "../tslint.json" }