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) |

---

### 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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---

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#380 automerged by dpebot

package.json

@@ -49,7 +49,7 @@
     "@google-cloud/projectify": "^0.3.2",
     "@google-cloud/promisify": "^0.4.0",
     "@types/duplexify": "^3.6.0",
-    "arrify": "^1.0.1",
+    "arrify": "^2.0.0",
     "concat-stream": "^2.0.0",
     "extend": "^3.0.1",
     "google-auth-library": "^3.0.0",
@@ -62,7 +62,6 @@
   },
   "devDependencies": {
     "@google-cloud/nodejs-repo-tools": "^3.0.0",
-    "@types/arrify": "^1.0.4",
     "@types/extend": "^3.0.0",
     "@types/is": "0.0.21",
     "@types/mocha": "^5.2.5",

src/entity.ts

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-import * as arrify from 'arrify';
+import arrify = require('arrify');
 import * as extend from 'extend';
 import * as is from 'is';
 import {Query, QueryProto} from './query';

src/index.ts

@@ -24,7 +24,7 @@
  * @namespace google.protobuf
  */
 
-import * as arrify from 'arrify';
+import arrify = require('arrify');
 import {GoogleAuth, GoogleAuthOptions} from 'google-auth-library';
 import {GrpcClient} from 'google-gax';
 import {ChannelCredentials} from 'grpc';
@@ -642,7 +642,7 @@ class Datastore extends DatastoreRequest {
       kind = namespaceOrKind;
       namespace = this.namespace!;
     }
-    return new Query(this, namespace, arrify(kind));
+    return new Query(this, namespace, arrify(kind) as string[]);
   }
 
   key(options: entity.KeyOptions): entity.Key;
@@ -700,7 +700,7 @@ class Datastore extends DatastoreRequest {
   key(options: string|entity.KeyOptions|PathType[]): entity.Key {
     options = is.object(options) ? options : {
       namespace: this.namespace,
-      path: arrify(options),
+      path: arrify(options) as PathType[],
     };
     return new entity.Key(options as entity.KeyOptions);
   }

src/query.ts

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-import * as arrify from 'arrify';
+import arrify = require('arrify');
 import {Key} from 'readline';
 import {Datastore} from '.';
 import {Entity} from './entity';

src/request.ts

@@ -16,7 +16,7 @@
 
 import {replaceProjectIdToken} from '@google-cloud/projectify';
 import {promisifyAll} from '@google-cloud/promisify';
-import * as arrify from 'arrify';
+import arrify = require('arrify');
 
 const concat = require('concat-stream');
 import * as extend from 'extend';

src/transaction.ts

@@ -15,7 +15,7 @@
  */
 
 import {promisifyAll} from '@google-cloud/promisify';
-import * as arrify from 'arrify';
+import arrify = require('arrify');
 import {CallOptions} from 'google-gax';
 
 import {google} from '../proto/datastore';

test/transaction.ts

@@ -15,7 +15,7 @@
  */
 
 import * as pfy from '@google-cloud/promisify';
-import * as arrify from 'arrify';
+import arrify = require('arrify');
 import * as assert from 'assert';
 import * as proxyquire from 'proxyquire';
 import * as sinon from 'sinon';