chore(deps): update dependency prettier to v1.13.7 (#45)

This Pull Request updates dependency [prettier](https://github.com/prettier/prettier) from `v1.13.6` to `v1.13.7`



<details>
<summary>Release Notes</summary>

### [`v1.13.7`](https://github.com/prettier/prettier/blob/master/CHANGELOG.md#&#8203;1137)
[Compare Source](prettier/prettier@1.13.6...1.13.7)
[diff](prettier/prettier@1.13.6...1.13.7)

- Remove calls to `eval("require")` in the distributed code ([#&#8203;4766](`prettier/prettier#4766))

---

</details>




---

This PR has been generated by [Renovate Bot](https://renovatebot.com).

package.json

@@ -48,7 +48,7 @@
     "typography-theme-github": "0.15.10"
   },
   "devDependencies": {
-    "prettier": "1.13.6"
+    "prettier": "1.13.7"
   },
   "homepage": "https://rdela.com/",
   "keywords": [

yarn.lock

@@ -7681,9 +7681,9 @@ preserve@^0.2.0:
   version "0.2.0"
   resolved "https://registry.yarnpkg.com/preserve/-/preserve-0.2.0.tgz#815ed1f6ebc65926f865b310c0713bcb3315ce4b"
 
-prettier@1.13.6:
-  version "1.13.6"
-  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.13.6.tgz#00ae0b777ad92f81a9e7a1df2f0470b6dab0cb44"
+prettier@1.13.7:
+  version "1.13.7"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.13.7.tgz#850f3b8af784a49a6ea2d2eaa7ed1428a34b7281"
 
 pretty-bytes@^4.0.2:
   version "4.0.2"