Bump net-ldap from 0.17.1 to 0.18.0

Bumps [net-ldap](https://github.com/ruby-ldap/ruby-net-ldap) from 0.17.1 to 0.18.0.
- [Release notes](https://github.com/ruby-ldap/ruby-net-ldap/releases)
- [Changelog](https://github.com/ruby-ldap/ruby-net-ldap/blob/master/History.rdoc)
- [Commits](https://github.com/ruby-ldap/ruby-net-ldap/compare/v0.17.1...v0.18.0)

---
updated-dependencies:
- dependency-name: net-ldap
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Gemfile

@@ -37,7 +37,7 @@ group :pam_authentication, optional: true do
   gem 'devise_pam_authenticatable2', '~> 9.2'
 end
 
-gem 'net-ldap', '~> 0.17'
+gem 'net-ldap', '~> 0.18'
 gem 'omniauth-cas', '~> 2.0'
 gem 'omniauth-saml', '~> 1.10'
 gem 'gitlab-omniauth-openid-connect', '~>0.10.0', require: 'omniauth_openid_connect'

Gemfile.lock

@@ -407,7 +407,7 @@ GEM
     msgpack (1.5.4)
     multi_json (1.15.0)
     multipart-post (2.1.1)
-    net-ldap (0.17.1)
+    net-ldap (0.18.0)
     net-scp (4.0.0.rc1)
       net-ssh (>= 2.6.5, < 8.0.0)
     net-ssh (7.0.1)
@@ -793,7 +793,7 @@ DEPENDENCIES
   memory_profiler
   microformats (~> 4.4)
   mime-types (~> 3.4.1)
-  net-ldap (~> 0.17)
+  net-ldap (~> 0.18)
   nokogiri (~> 1.13)
   nsa (~> 0.2)
   oj (~> 3.13)