build(deps-dev): Bump jsii-docgen from 1.8.104 to 1.8.105 (#388)

Bumps [jsii-docgen](https://github.com/eladb/jsii-docgen) from 1.8.104 to 1.8.105.
<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>v1.8.105</h2>
<h3><a href="https://github.com/eladb/jsii-docgen/compare/v1.8.104...v1.8.105">1.8.105</a> (2021-06-25)</h3>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/cdklabs/jsii-docgen/commit/e5329c7ad7aca782bade2f9fd6df5c10f2a3b61c"><code>e5329c7</code></a> chore(deps): upgrade dependencies (<a href="https://github-redirect.dependabot.com/eladb/jsii-docgen/issues/349">#349</a>)</li>
<li>See full diff in <a href="https://github.com/eladb/jsii-docgen/compare/v1.8.104...v1.8.105">compare view</a></li>
</ul>
</details>
<br />


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</details>

yarn.lock

@@ -3606,9 +3606,9 @@ jsii-diff@^1.19.0:
     yargs "^16.2.0"
 
 jsii-docgen@^1.8.33:
-  version "1.8.104"
-  resolved "https://registry.yarnpkg.com/jsii-docgen/-/jsii-docgen-1.8.104.tgz#a1794b9aa663842a71e0e68fe27541dc6fcbc562"
-  integrity sha512-ITZCn2rTrWV0d9GcNWDbjmzoZ4fnQl/KL1R67244iBC8hIVthUHnC5JZiNPsUhrxTNhBwyixwkRJE7XEImb/eg==
+  version "1.8.105"
+  resolved "https://registry.yarnpkg.com/jsii-docgen/-/jsii-docgen-1.8.105.tgz#26dfefeee91eff592d4f7c6d391d01ae0a87cdf6"
+  integrity sha512-n9VhecmdVGNACHBKUhDcjOCZ0c818a7cfurDVK7jMB6BCCxYnWgf8iQYMHzETX46eDOzxRhMJ16g2TbfXmtS7g==
   dependencies:
     "@jsii/spec" "^1.30.0"
     fs-extra "^9.1.0"