chore(deps): update dependency jest to v24.0.0-alpha.15 (#53)

This PR contains the following updates:

| Package | Type | Update | Change | References |
|---|---|---|---|---|
| jest | devDependencies | patch | `24.0.0-alpha.13` -> `24.0.0-alpha.15` | [homepage](https://jestjs.io/), [source](https://togithub.com/facebook/jest) |

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### Release Notes

<details>
<summary>facebook/jest</summary>

### [`v24.0.0-alpha.15`](https://togithub.com/facebook/jest/compare/v24.0.0-alpha.14...v24.0.0-alpha.15)

[Compare Source](https://togithub.com/facebook/jest/compare/v24.0.0-alpha.14...v24.0.0-alpha.15)

### [`v24.0.0-alpha.14`](https://togithub.com/facebook/jest/compare/v24.0.0-alpha.13...v24.0.0-alpha.14)

[Compare Source](https://togithub.com/facebook/jest/compare/v24.0.0-alpha.13...v24.0.0-alpha.14)

</details>

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package.json

@@ -34,7 +34,7 @@
     "graphql": "14.1.1",
     "hsu-scripts": "1.0.2",
     "husky": "1.3.1",
-    "jest": "24.0.0-alpha.13",
+    "jest": "24.0.0-alpha.15",
     "lint-staged": "8.1.0",
     "prettier": "1.16.1"
   },