fix(deps): update dependency arrify to v2

fix(deps): update dependency arrify to v2

This PR contains the following updates:

| Package | Type | Update | Change | References |
|---|---|---|---|---|
| arrify | dependencies | major | [`^1.0.1` -> `^2.0.0`](https://diff.intrinsic.com/arrify/1.0.1/2.0.0) | [source](https://togithub.com/sindresorhus/arrify) |

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### Release Notes

<details>
<summary>sindresorhus/arrify</summary>

### [`v2.0.0`](https://togithub.com/sindresorhus/arrify/releases/v2.0.0)

[Compare Source](https://togithub.com/sindresorhus/arrify/compare/v1.0.1...v2.0.0)

Breaking:

-   Require Node.js 8 ([#&#8203;6](https://togithub.com/sindresorhus/arrify/issues/6))  [`8d6734f`](https://togithub.com/sindresorhus/arrify/commit/8d6734f)

Enhancements:

-   Add TypeScript definition ([#&#8203;6](https://togithub.com/sindresorhus/arrify/issues/6))  [`8d6734f`](https://togithub.com/sindresorhus/arrify/commit/8d6734f)

</details>

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#239 automerged by dpebot

Author: renovate[bot]

packages/google-cloud-translate/package.json

@@ -48,7 +48,7 @@
   "dependencies": {
     "@google-cloud/common": "^0.32.0",
     "@google-cloud/promisify": "^0.4.0",
-    "arrify": "^1.0.1",
+    "arrify": "^2.0.0",
     "extend": "^3.0.1",
     "google-gax": "^0.25.4",
     "is": "^3.2.1",
@@ -59,7 +59,6 @@
   },
   "devDependencies": {
     "@google-cloud/nodejs-repo-tools": "^3.2.0",
-    "@types/arrify": "^1.0.4",
     "@types/extend": "^3.0.0",
     "@types/is": "0.0.21",
     "@types/mocha": "^5.2.4",

packages/google-cloud-translate/src/v2/index.ts

@@ -14,7 +14,7 @@
 
 import {Service, util} from '@google-cloud/common';
 import {promisifyAll} from '@google-cloud/promisify';
-import * as arrify from 'arrify';
+import arrify = require('arrify');
 import * as extend from 'extend';
 import {GoogleAuthOptions} from 'google-auth-library';
 import * as is from 'is';