fix(deps): update dependency @google-cloud/paginator to v3 (#299)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [@google-cloud/paginator](https://github.com/googleapis/nodejs-paginator) | dependencies | major | [`^2.0.0` -> `^3.0.0`](https://renovatebot.com/diffs/npm/@google-cloud%2fpaginator/2.0.3/3.0.0) |

---

### Release Notes

<details>
<summary>googleapis/nodejs-paginator</summary>

### [`v3.0.0`](https://github.com/googleapis/nodejs-paginator/blob/master/CHANGELOG.md#&#8203;300-httpswwwgithubcomgoogleapisnodejs-paginatorcomparev203v300-2020-03-25)

[Compare Source](https://github.com/googleapis/nodejs-paginator/compare/v2.0.3...v3.0.0)

##### ⚠ BREAKING CHANGES

-   **dep:** upgrade gts 2.0.0 ([#&#8203;194](https://github.com/googleapis/nodejs-paginator/issues/194))
-   **deps:** deprecated node 8 to 10; upgrade typescript

##### Miscellaneous Chores

-   **dep:** upgrade gts 2.0.0 ([#&#8203;194](https://www.github.com/googleapis/nodejs-paginator/issues/194)) ([4eaf9be](https://www.github.com/googleapis/nodejs-paginator/commit/4eaf9bed1fcfd0f10e877ff15c1d0e968e3356c8))
-   **deps:** deprecated node 8 to 10; upgrade typescript ([f6434ab](https://www.github.com/googleapis/nodejs-paginator/commit/f6434ab9cacb6ab804c070f19c38b6072ca326b5))

##### [2.0.3](https://www.github.com/googleapis/nodejs-paginator/compare/v2.0.2...v2.0.3) (2019-12-05)

##### Bug Fixes

-   **deps:** pin TypeScript below 3.7.0 ([e06e1b0](https://www.github.com/googleapis/nodejs-paginator/commit/e06e1b0a2e2bb1cf56fc806c1703b8b5e468b954))

##### [2.0.2](https://www.github.com/googleapis/nodejs-paginator/compare/v2.0.1...v2.0.2) (2019-11-13)

##### Bug Fixes

-   **docs:** add jsdoc-region-tag plugin ([#&#8203;155](https://www.github.com/googleapis/nodejs-paginator/issues/155)) ([b983799](https://www.github.com/googleapis/nodejs-paginator/commit/b98379905848fd179c6268aff3e1cfaf2bf76663))

##### [2.0.1](https://www.github.com/googleapis/nodejs-paginator/compare/v2.0.0...v2.0.1) (2019-08-25)

##### Bug Fixes

-   **deps:** use the latest extend ([#&#8203;141](https://www.github.com/googleapis/nodejs-paginator/issues/141)) ([61b383e](https://www.github.com/googleapis/nodejs-paginator/commit/61b383e))

</details>

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package.json

@@ -44,7 +44,7 @@
   },
   "dependencies": {
     "@google-cloud/common": "^3.0.0",
-    "@google-cloud/paginator": "^2.0.0",
+    "@google-cloud/paginator": "^3.0.0",
     "@google-cloud/promisify": "^1.0.0"
   },
   "devDependencies": {