Add typings for rate-limit-redis (#39036)

* Add typings for rate-limit-redis

* Limit rate-limit-redis to TS 2.3 b/c of express-rate-limit requirement

* Bump rate-limit-redis to TS 2.7

types/rate-limit-redis/index.d.ts

@@ -0,0 +1,19 @@
+// Type definitions for rate-limit-redis 1.6
+// Project: https://github.com/wyattjoh/rate-limit-redis#readme
+// Definitions by: Chris Suich <https://github.com/csuich2>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.7
+
+import { RedisClient } from 'redis';
+import { Store } from 'express-rate-limit';
+
+interface RedisStoreOptions {
+    expiry?: number;
+    prefix?: string;
+    resetExpiryOnChange?: boolean;
+    client?: RedisClient;
+}
+
+declare function RedisStore(options?: RedisStoreOptions): Store;
+
+export = RedisStore;

types/rate-limit-redis/package.json

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+{
+    "private": true,
+    "dependencies": {
+        "express-rate-limit": ">=3.4.0"
+    }
+}

types/rate-limit-redis/rate-limit-redis-tests.ts

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+import { RedisClient } from 'redis';
+import RedisStore from 'rate-limit-redis';
+import { Store } from 'express-rate-limit';
+
+let store: Store;
+
+// $ExpectType Store
+store = RedisStore();
+
+// $ExpectType Store
+store = RedisStore({
+    expiry: 1000,
+});
+
+// $ExpectType Store
+store = RedisStore({
+    prefix: 'types',
+});
+
+// $ExpectType Store
+store = RedisStore({
+    resetExpiryOnChange: false,
+});
+
+// $ExpectType Store
+store = RedisStore({
+    client: new RedisClient({}),
+});

types/rate-limit-redis/tsconfig.json

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+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictFunctionTypes": true,
+        "strictNullChecks": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true,
+        "esModuleInterop": true
+    },
+    "files": [
+        "index.d.ts",
+        "rate-limit-redis-tests.ts"
+    ]
+}

types/rate-limit-redis/tslint.json

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