Bump reline from 0.3.9 to 0.4.0 in /spec/tester_mongo_rails_6 (#314)

Bumps [reline](https://github.com/ruby/reline) from 0.3.9 to 0.4.0.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/ruby/reline/releases">reline's
releases</a>.</em></p>
<blockquote>
<h2>v0.4.0</h2>
<!-- raw HTML omitted -->
<h2>What's Changed</h2>
<h3>✨ Enhancements</h3>
<ul>
<li>Introduce a new class Reline::Face to configure character attributes
by <a href="https://github.com/hasumikin"><code>@​hasumikin</code></a>
in <a
href="https://redirect.github.com/ruby/reline/pull/552">ruby/reline#552</a></li>
</ul>
<h3>🛠 Other Changes</h3>
<ul>
<li>Daily CI by <a
href="https://github.com/ima1zumi"><code>@​ima1zumi</code></a> in <a
href="https://redirect.github.com/ruby/reline/pull/597">ruby/reline#597</a></li>
<li>Add Racc as a development dependency by <a
href="https://github.com/hasumikin"><code>@​hasumikin</code></a> in <a
href="https://redirect.github.com/ruby/reline/pull/599">ruby/reline#599</a></li>
<li>Test Reline::Face without mocking by <a
href="https://github.com/st0012"><code>@​st0012</code></a> in <a
href="https://redirect.github.com/ruby/reline/pull/600">ruby/reline#600</a></li>
<li>Bump version to 0.4.0 by <a
href="https://github.com/ima1zumi"><code>@​ima1zumi</code></a> in <a
href="https://redirect.github.com/ruby/reline/pull/601">ruby/reline#601</a></li>
</ul>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/ruby/reline/compare/v0.3.9...v0.4.0">https://github.com/ruby/reline/compare/v0.3.9...v0.4.0</a></p>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/ruby/reline/commit/d15ab72d4fdec527e96a4a51e0496416fee4b315"><code>d15ab72</code></a>
Bump version to 0.4.0 (<a
href="https://redirect.github.com/ruby/reline/issues/601">#601</a>)</li>
<li><a
href="https://github.com/ruby/reline/commit/d2189ac43672b42710dec3f467dc3afaae64cce3"><code>d2189ac</code></a>
Test Reline::Face without mocking (<a
href="https://redirect.github.com/ruby/reline/issues/600">#600</a>)</li>
<li><a
href="https://github.com/ruby/reline/commit/fdc1d3b1e567939d113f2a78388e7092185d684b"><code>fdc1d3b</code></a>
Introduce a new class Reline::Face to configure character attributes (<a
href="https://redirect.github.com/ruby/reline/issues/552">#552</a>)</li>
<li><a
href="https://github.com/ruby/reline/commit/e094be068536924348c5f3152836cc2ecea9bec8"><code>e094be0</code></a>
same purpose as <a
href="https://redirect.github.com/ruby/irb/pull/747">ruby/irb#747</a>
(<a
href="https://redirect.github.com/ruby/reline/issues/599">#599</a>)</li>
<li><a
href="https://github.com/ruby/reline/commit/c873fb73144087f491e616d3ccd02186d9e6810c"><code>c873fb7</code></a>
Daily CI (<a
href="https://redirect.github.com/ruby/reline/issues/597">#597</a>)</li>
<li>See full diff in <a
href="https://github.com/ruby/reline/compare/v0.3.9...v0.4.0">compare
view</a></li>
</ul>
</details>
<br />


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spec/tester_mongo_rails_6/Gemfile.lock

@@ -172,7 +172,7 @@ GEM
     rake (13.1.0)
     rdoc (6.6.0)
       psych (>= 4.0.0)
-    reline (0.3.9)
+    reline (0.4.0)
       io-console (~> 0.5)
     rspec-core (3.12.2)
       rspec-support (~> 3.12.0)