build(deps-dev): Bump jsii-docgen from 1.8.97 to 1.8.98 (#369)

Bumps [jsii-docgen](https://github.com/eladb/jsii-docgen) from 1.8.97 to 1.8.98.
<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>v1.8.98</h2>
<h3><a href="https://github.com/eladb/jsii-docgen/compare/v1.8.97...v1.8.98">1.8.98</a> (2021-06-16)</h3>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/cdklabs/jsii-docgen/commit/68d456c7ab6d9b0dfcca1bb7c2f295b65b371f42"><code>68d456c</code></a> chore(deps): upgrade dependencies (<a href="https://github-redirect.dependabot.com/eladb/jsii-docgen/issues/342">#342</a>)</li>
<li>See full diff in <a href="https://github.com/eladb/jsii-docgen/compare/v1.8.97...v1.8.98">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 "1.8.97"
-  resolved "https://registry.yarnpkg.com/jsii-docgen/-/jsii-docgen-1.8.97.tgz#009777b621b0b31639363d9f9a70cb3cc196c66f"
-  integrity sha512-vA6Yja3t+o/3iS+rkSCMPLg7gf9CxjuuA4F7fyqwE1ODqYbe5nv7YpUqRDGWge0eU6S4nVnwMiDBAAOSRc2D5w==
+  version "1.8.98"
+  resolved "https://registry.yarnpkg.com/jsii-docgen/-/jsii-docgen-1.8.98.tgz#7f27d7b06280ce25b3eccf383170df63d7b00ab6"
+  integrity sha512-0n0BqC+5ExqAJsfi53CGrZ478zYM+Rg5UqdwrIQewc34uRT2ygN+zjECEL4MKEk+TSg3qs8sOKogCQ0z48jaHA==
   dependencies:
     "@jsii/spec" "^1.30.0"
     fs-extra "^9.1.0"