Bump debug from 1.9.0 to 1.9.1 (#166)

Bumps [debug](https://github.com/ruby/debug) from 1.9.0 to 1.9.1.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/ruby/debug/releases">debug's
releases</a>.</em></p>
<blockquote>
<h2>v1.9.1</h2>
<p>Fix small issue to release with Ruby 3.3.0.</p>
<h2>What's Changed</h2>
<ul>
<li>Fix BT on nested break by <a
href="https://github.com/ko1"><code>@​ko1</code></a> in <a
href="https://redirect.github.com/ruby/debug/pull/1047">ruby/debug#1047</a></li>
</ul>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/ruby/debug/compare/v1.9.0...v1.9.1">https://github.com/ruby/debug/compare/v1.9.0...v1.9.1</a></p>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/ruby/debug/commit/9de0ff46faeea73aed27bb090ee052db8fb74c14"><code>9de0ff4</code></a>
v1.9.1</li>
<li><a
href="https://github.com/ruby/debug/commit/557233a90ff623c7dd00384a08471e5a5514f688"><code>557233a</code></a>
fix bt on nested break points</li>
<li><a
href="https://github.com/ruby/debug/commit/52694a9e05aea1ae5bcd9c13591bb3f06724bde6"><code>52694a9</code></a>
add verbose mode for <code>debug_code</code></li>
<li><a
href="https://github.com/ruby/debug/commit/d4feeae32b69b4f88c94fecfc7a283b475eec4de"><code>d4feeae</code></a>
fix condition of USE_TMP_HOME</li>
<li>See full diff in <a
href="https://github.com/ruby/debug/compare/v1.9.0...v1.9.1">compare
view</a></li>
</ul>
</details>
<br />


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Gemfile.lock

@@ -121,7 +121,7 @@ GEM
       capybara (~> 3.0)
       ferrum (~> 0.14.0)
     date (3.3.4)
-    debug (1.9.0)
+    debug (1.9.1)
       irb (~> 1.10)
       reline (>= 0.3.8)
     diff-lcs (1.5.0)