Bump ruby-saml from 1.17.0 to 1.18.0 (#246)

Bumps [ruby-saml](https://github.com/saml-toolkits/ruby-saml) from
1.17.0 to 1.18.0.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/saml-toolkits/ruby-saml/releases">ruby-saml's
releases</a>.</em></p>
<blockquote>
<h3>1.18.0  (Mar 12, 2025)</h3>
<ul>
<li><a
href="https://redirect.github.com/SAML-Toolkits/ruby-saml/pull/750">#750</a>
Fix vulnerabilities: CVE-2025-25291, CVE-2025-25292: SAML authentication
bypass via Signature Wrapping attack allowed due parser differential.
Fix vulnerability: CVE-2025-25293: Potential DOS abusing of compressed
messages.</li>
<li><a
href="https://redirect.github.com/SAML-Toolkits/ruby-saml/pull/718/">#718</a>
Add support to retrieve from SAMLResponse the AuthnInstant and
AuthnContextClassRef values</li>
<li><a
href="https://redirect.github.com/SAML-Toolkits/ruby-saml/pull/720">#720</a>
Fix ambiguous regex warnings</li>
<li><a
href="https://redirect.github.com/SAML-Toolkits/ruby-saml/pull/715">#715</a>
Fix typo in SPNameQualifier error text</li>
</ul>
</blockquote>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/SAML-Toolkits/ruby-saml/blob/master/CHANGELOG.md">ruby-saml's
changelog</a>.</em></p>
<blockquote>
<h3>1.18.0  (Mar 12, 2025)</h3>
<ul>
<li><a
href="https://redirect.github.com/SAML-Toolkits/ruby-saml/pull/750">#750</a>
Fix vulnerabilities: CVE-2025-25291, CVE-2025-25292: SAML authentication
bypass via Signature Wrapping attack allowed due parser differential.
Fix vulnerability: CVE-2025-25293: Potential DOS abusing of compressed
messages.</li>
<li><a
href="https://redirect.github.com/SAML-Toolkits/ruby-saml/pull/718/">#718</a>
Add support to retrieve from SAMLResponse the AuthnInstant and
AuthnContextClassRef values</li>
<li><a
href="https://redirect.github.com/SAML-Toolkits/ruby-saml/pull/720">#720</a>
Fix ambiguous regex warnings</li>
<li><a
href="https://redirect.github.com/SAML-Toolkits/ruby-saml/pull/715">#715</a>
Fix typo in SPNameQualifier error text</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/SAML-Toolkits/ruby-saml/commit/6a7c040049babe748ee1bb4ca13898c47189114c"><code>6a7c040</code></a>
Reorder Changelog and include reference to 1.12.4</li>
<li><a
href="https://github.com/SAML-Toolkits/ruby-saml/commit/51ef41d772dca6aa7af03f9ff85b4a05836333bc"><code>51ef41d</code></a>
Release 1.18.0</li>
<li><a
href="https://github.com/SAML-Toolkits/ruby-saml/commit/fb2eac1c897ff724392879880d55af3a09266b8c"><code>fb2eac1</code></a>
Merge pull request <a
href="https://redirect.github.com/saml-toolkits/ruby-saml/issues/750">#750</a>
from SAML-Toolkits/security_fix_1.18.0</li>
<li><a
href="https://github.com/SAML-Toolkits/ruby-saml/commit/e9c1cdbd0f9afa467b585de279db0cbd0fb8ae97"><code>e9c1cdb</code></a>
Fix vulnerabilities: CVE-2025-25291, CVE-2025-25292: SAML authentication
bypa...</li>
<li><a
href="https://github.com/SAML-Toolkits/ruby-saml/commit/acac9e9cc0b9a507882c614f25d41f8b47be349a"><code>acac9e9</code></a>
Fix vulnerability: CVE-2025-25293: Potential DOS abusing of compressed
messages.</li>
<li><a
href="https://github.com/SAML-Toolkits/ruby-saml/commit/60627ba14cdada1398b6b7f8488dbdc6fa7144a6"><code>60627ba</code></a>
Fix Test</li>
<li><a
href="https://github.com/SAML-Toolkits/ruby-saml/commit/0d1683534349ff4608a3f29a1a2e3d0bb813bb57"><code>0d16835</code></a>
Merge pull request <a
href="https://redirect.github.com/saml-toolkits/ruby-saml/issues/741">#741</a>
from andimrob/readme-improvements</li>
<li><a
href="https://github.com/SAML-Toolkits/ruby-saml/commit/927d6f09051ae175e424fb2654636605bd61282e"><code>927d6f0</code></a>
docs: readme improvements</li>
<li><a
href="https://github.com/SAML-Toolkits/ruby-saml/commit/bbe39e9e141f3b1758927caa40735482bbcf1366"><code>bbe39e9</code></a>
Merge pull request <a
href="https://redirect.github.com/saml-toolkits/ruby-saml/issues/740">#740</a>
from johnnyshields/backport-jruby-fix</li>
<li><a
href="https://github.com/SAML-Toolkits/ruby-saml/commit/011ff4f5be070873fc88a197a9ad188494e2f12a"><code>011ff4f</code></a>
Update test_helper.rb</li>
<li>Additional commits viewable in <a
href="https://github.com/saml-toolkits/ruby-saml/compare/v1.17.0...v1.18.0">compare
view</a></li>
</ul>
</details>
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Gemfile.lock

@@ -396,7 +396,7 @@ GEM
     responders (3.1.0)
       actionpack (>= 5.2)
       railties (>= 5.2)
-    rexml (3.3.9)
+    rexml (3.4.1)
     rspec (3.13.0)
       rspec-core (~> 3.13.0)
       rspec-expectations (~> 3.13.0)
@@ -451,7 +451,7 @@ GEM
       rubocop (~> 1.33)
       rubocop-capybara (~> 2.17)
     ruby-progressbar (1.11.0)
-    ruby-saml (1.17.0)
+    ruby-saml (1.18.0)
       nokogiri (>= 1.13.10)
       rexml
     rubyzip (2.3.2)