fix(deps): update dependency @google-cloud/projectify to v2 (#673)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [@google-cloud/projectify](https://togithub.com/googleapis/nodejs-projectify) | dependencies | major | [`^1.0.0` -> `^2.0.0`](https://renovatebot.com/diffs/npm/@google-cloud%2fprojectify/1.0.4/2.0.0) |

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### Release Notes

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

### [`v2.0.0`](https://togithub.com/googleapis/nodejs-projectify/blob/master/CHANGELOG.md#&#8203;200-httpswwwgithubcomgoogleapisnodejs-projectifycomparev104v200-2020-03-24)

[Compare Source](https://togithub.com/googleapis/nodejs-projectify/compare/v1.0.4...v2.0.0)

##### ⚠ BREAKING CHANGES

-   typescript@3.7 introduced some breaking changes
-   drop Node 8 from engines field ([#&#8203;172](https://togithub.com/googleapis/nodejs-projectify/issues/172))

##### Features

-   drop Node 8 from engines field ([#&#8203;172](https://www.github.com/googleapis/nodejs-projectify/issues/172)) ([3eac424](https://www.github.com/googleapis/nodejs-projectify/commit/3eac424bfb1ee47144a77888dc68db687988945e))

##### Build System

-   update to latest version of gts/typescript ([#&#8203;171](https://www.github.com/googleapis/nodejs-projectify/issues/171)) ([30f90cc](https://www.github.com/googleapis/nodejs-projectify/commit/30f90cc172da6ed9394da91869556bf5eef42434))

##### [1.0.4](https://www.github.com/googleapis/nodejs-projectify/compare/v1.0.3...v1.0.4) (2019-12-05)

##### Bug Fixes

-   **publish:** publication failed to reach npm ([#&#8203;141](https://www.github.com/googleapis/nodejs-projectify/issues/141)) ([5406ba5](https://www.github.com/googleapis/nodejs-projectify/commit/5406ba5e1d43a228a19072023c1baebce34190af))

##### [1.0.3](https://www.github.com/googleapis/nodejs-projectify/compare/v1.0.2...v1.0.3) (2019-12-05)

##### Bug Fixes

-   **deps:** pin TypeScript below 3.7.0 ([6c95307](https://www.github.com/googleapis/nodejs-projectify/commit/6c953070139a77d30c4ce5b7dee1443874046906))

##### [1.0.2](https://www.github.com/googleapis/nodejs-projectify/compare/v1.0.1...v1.0.2) (2019-11-14)

##### Bug Fixes

-   **docs:** add jsdoc-region-tag plugin ([#&#8203;135](https://www.github.com/googleapis/nodejs-projectify/issues/135)) ([59301e7](https://www.github.com/googleapis/nodejs-projectify/commit/59301e7cfa855add4894dd9c46870e61fffa7413))

##### [1.0.1](https://www.github.com/googleapis/nodejs-projectify/compare/v1.0.0...v1.0.1) (2019-06-26)

##### Bug Fixes

-   **docs:** link to reference docs section on googleapis.dev ([#&#8203;119](https://www.github.com/googleapis/nodejs-projectify/issues/119)) ([90a009f](https://www.github.com/googleapis/nodejs-projectify/commit/90a009f))

</details>

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package.json

@@ -44,7 +44,7 @@
   "dependencies": {
     "@google-cloud/common": "^2.2.2",
     "@google-cloud/paginator": "^2.0.0",
-    "@google-cloud/projectify": "^1.0.0",
+    "@google-cloud/projectify": "^2.0.0",
     "@google-cloud/promisify": "^1.0.0",
     "arrify": "^2.0.0",
     "concat-stream": "^2.0.0",