chore(deps-dev): bump jsii-docgen from 1.8.70 to 1.8.71 (#40)

Bumps [jsii-docgen](https://github.com/eladb/jsii-docgen) from 1.8.70 to 1.8.71.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/eladb/jsii-docgen/releases">jsii-docgen's releases</a>.</em></p>
<blockquote>
<h2>v1.8.71</h2>
<h3><a href="https://github.com/eladb/jsii-docgen/compare/v1.8.70...v1.8.71">1.8.71</a> (2021-05-04)</h3>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/cdklabs/jsii-docgen/commit/25ea550c83a9ca983465b82b3abb27856ae5f34d"><code>25ea550</code></a> Merge pull request <a href="https://github-redirect.dependabot.com/eladb/jsii-docgen/issues/309">#309</a> from cdklabs/auto/projen-upgrade</li>
<li><a href="https://github.com/cdklabs/jsii-docgen/commit/1b83b26226d6b744ba3dc1a6ea2d0ab52bffdaa1"><code>1b83b26</code></a> chore: upgrade projen</li>
<li>See full diff in <a href="https://github.com/eladb/jsii-docgen/compare/v1.8.70...v1.8.71">compare view</a></li>
</ul>
</details>
<br />


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</details>

yarn.lock

@@ -4135,9 +4135,9 @@ jsii-diff@^1.28.0:
     yargs "^16.2.0"
 
 jsii-docgen@^1.8.67:
-  version "1.8.70"
-  resolved "https://registry.yarnpkg.com/jsii-docgen/-/jsii-docgen-1.8.70.tgz#1ad3dc13152a3cfecf3982bf5897eab5bdf204e4"
-  integrity sha512-bs3EqUDhruXeYSOOTE28jnXxRXkQQAQJAbbmj8T94bQvIpHeo1kr1lMXZVfLJ3RJ+5MwbJZokTo2WsavFN1AVA==
+  version "1.8.71"
+  resolved "https://registry.yarnpkg.com/jsii-docgen/-/jsii-docgen-1.8.71.tgz#8a6a1c4d0edd4508c97580e55be20468a2a8eaf6"
+  integrity sha512-3uyf4X7O0hPKk3KqSIwt2N/duDewlJb4kRIQVvbJmYJubjECgmLcDtku7PVSjFxEjP1IoVUnvbpI5pcvmdqVAw==
   dependencies:
     "@jsii/spec" "^1.16.0"
     fs-extra "^9.0.1"