Add 'page-icon' package (#11918)

page-icon/page-icon-tests.ts

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+/// <reference path="./page-icon.d.ts" />
+
+import * as pageIcon from "page-icon";
+
+const siteUrl = "https://www.facebook.com/";
+pageIcon(siteUrl)
+    .then(function(icon) {
+        // do things with icon object
+        console.log(icon);
+    })
+    .catch(error => {
+        console.error(error);
+    });
+
+const twUrl = "https://twitter.com";
+pageIcon(twUrl, {ext: ".png"})
+    .then(icon => {
+        if (!icon) {
+            return;
+        }
+        console.log(icon.source, icon.name, icon.data, icon.size, icon.ext, icon.mime);
+    })
+    .catch(err => {
+        console.error(err);
+    });

page-icon/page-icon.d.ts

@@ -0,0 +1,25 @@
+// Type definitions for page-icon 0.3.0
+// Project: https://github.com/jiahaog/page-icon
+// Definitions by: rhysd <https://rhysd.github.io>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+/// <reference path="../node/node.d.ts" />
+
+declare namespace PageIcon {
+	interface Icon {
+		source: string;
+		name: string;
+		data: Buffer;
+		size: number;
+		ext: string;
+		mime: string;
+	}
+	interface FetchOptions {
+		ext?: string;
+	}
+}
+
+declare module "page-icon" {
+	const mod: (url: string, opts?: PageIcon.FetchOptions) => Promise<PageIcon.Icon>;
+	export = mod;
+}