chore(deps-dev): bump jsii-docgen from 1.4.46 to 1.4.47 (projen#164)

Bumps [jsii-docgen](https://github.com/eladb/jsii-docgen) from 1.4.46 to 1.4.47.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a href="https://github.com/aws/jsii-docgen/blob/master/CHANGELOG.md">jsii-docgen's changelog</a>.</em></p>
<blockquote>
<h3>1.4.47 (2020-10-05)</h3>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/aws/jsii-docgen/commit/db81d756b42514deaf0a310ce6a66603b986fb92"><code>db81d75</code></a> chore(release): 1.4.47</li>
<li><a href="https://github.com/aws/jsii-docgen/commit/c76723652739ef9c5d509989b3be3151ee8c89be"><code>c767236</code></a> chore: upgrade projen (<a href="https://github-redirect.dependabot.com/eladb/jsii-docgen/issues/75">#75</a>)</li>
<li>See full diff in <a href="https://github.com/eladb/jsii-docgen/compare/v1.4.46...v1.4.47">compare view</a></li>
</ul>
</details>
<br />


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yarn.lock

@@ -3677,9 +3677,9 @@ jsii-diff@^1.11.0:
     yargs "^16.0.3"
 
 jsii-docgen@^1.3.2:
-  version "1.4.46"
-  resolved "https://registry.yarnpkg.com/jsii-docgen/-/jsii-docgen-1.4.46.tgz#3060f4c7c4284e8482253654f69861ddd466c9af"
-  integrity sha512-LCy0PMTYd2cRUbWC0TZKxfoE8U6gC0QVKmPOGZzunQuVXO0usF/cKMVOGNRqCBKozEzXqL8xvbl2ax/jgX/GbA==
+  version "1.4.47"
+  resolved "https://registry.yarnpkg.com/jsii-docgen/-/jsii-docgen-1.4.47.tgz#1c0d34d6966b59dafbdb96e5f25e766a1ae7f67f"
+  integrity sha512-tTliHNJjjHnEb5x4Fz+4DYXBjNEcSlmFekntf/p4ACpWx8+lfsOl1BKAzUPH+TuCKPN4FJXem/JJL6QhgthRNQ==
   dependencies:
     "@jsii/spec" "^1.9.0"
     fs-extra "^9.0.0"