Add types for ajv-async package (#39140)

* Add types for ajv-async package

* Add ts version

* Upd dependency

* Fix: return Ajv instead of void

types/ajv-async/ajv-async-tests.ts

@@ -0,0 +1,5 @@
+import * as Ajv from 'ajv';
+import setupAsyncToAJV = require('ajv-async');
+
+const ajv = new Ajv();
+setupAsyncToAJV(ajv); // $ExpectType Ajv

types/ajv-async/index.d.ts

@@ -0,0 +1,10 @@
+// Type definitions for ajv-async 1.0
+// Project: https://github.com/epoberezkin/ajv-async#readme
+// Definitions by: es <https://github.com/dmitriismitnov>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.2
+
+import { Ajv } from 'ajv';
+
+declare function ajvAsync(ajv: Ajv): Ajv;
+export = ajvAsync;

types/ajv-async/package.json

@@ -0,0 +1,6 @@
+{
+    "private": true,
+    "dependencies": {
+        "ajv": "*"
+    }
+}

types/ajv-async/tsconfig.json

@@ -0,0 +1,23 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictFunctionTypes": true,
+        "strictNullChecks": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "ajv-async-tests.ts"
+    ]
+}

types/ajv-async/tslint.json

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