chore(deps): update dependency meteor-theme-hexo to v1.0.13 (#933)

This Pull Request updates dependency [meteor-theme-hexo](https://github.com/meteor/meteor-theme-hexo) from `v1.0.10` to `v1.0.13`



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

### [`v1.0.13`](https://github.com/meteor/meteor-theme-hexo/blob/master/CHANGELOG.md#v1013)
[Compare Source](meteor/meteor-theme-hexo@v1.0.12...v1.0.13)
* Align headings with tiered structure content.
  [PR #&#8203;78](`meteor/meteor-theme-hexo#78)

---

### [`v1.0.12`](https://github.com/meteor/meteor-theme-hexo/blob/master/CHANGELOG.md#v1012)
[Compare Source](meteor/meteor-theme-hexo@v1.0.11...v1.0.12)
* Fix the tiered structure of the sidebar items to maintain content nesting!
  [PR #&#8203;77](`meteor/meteor-theme-hexo#77)

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### [`v1.0.11`](https://github.com/meteor/meteor-theme-hexo/blob/master/CHANGELOG.md#v1011)
[Compare Source](meteor/meteor-theme-hexo@2b6e168...v1.0.11)
* Update theme with new look for Apollo.  The Meteor theme is mostly untouched
  but there have been some small changes in it as well.
  [PR #&#8203;71](`meteor/meteor-theme-hexo#71)

---

</details>




---

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

docs/package.json

@@ -14,7 +14,7 @@
  "hexo-renderer-less": "0.2.0",
  "hexo-renderer-marked": "0.3.2",
  "hexo-server": "0.3.2",
- "meteor-theme-hexo": "1.0.10"
+ "meteor-theme-hexo": "1.0.13"
  },
  "scripts": {
  "start": "npm run build && chexo apollo-hexo-config -- server",