Merge branch 'update-omniauth-saml' into 'master'

Update omniauth-saml to 1.6.0 to address a security vulnerability in ruby-saml

## What does this MR do?

Updates `omniauth-saml` to bring in the new `ruby-saml` dependency that addresses [CVE-2016-5697](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-5697)

Fixes #19206

See merge request !4951

CHANGELOG

@@ -2,6 +2,7 @@ Please view this file on the master branch, on stable branches it's out of date.
 
 v 8.9.2
   - Fix visibility of snippets when searching.
+  - Update omniauth-saml to 1.6.0 !4951
 
 v 8.9.1
   - Refactor labels documentation. !3347

Gemfile

@@ -30,7 +30,7 @@ gem 'omniauth-github',        '~> 1.1.1'
 gem 'omniauth-gitlab',        '~> 1.0.0'
 gem 'omniauth-google-oauth2', '~> 0.2.0'
 gem 'omniauth-kerberos',      '~> 0.3.0', group: :kerberos
-gem 'omniauth-saml',          '~> 1.5.0'
+gem 'omniauth-saml',          '~> 1.6.0'
 gem 'omniauth-shibboleth',    '~> 1.2.0'
 gem 'omniauth-twitter',       '~> 1.2.0'
 gem 'omniauth_crowd',         '~> 2.2.0'

Gemfile.lock

@@ -468,9 +468,9 @@ GEM
     omniauth-oauth2 (1.3.1)
       oauth2 (~> 1.0)
       omniauth (~> 1.2)
-    omniauth-saml (1.5.0)
+    omniauth-saml (1.6.0)
       omniauth (~> 1.3)
-      ruby-saml (~> 1.1, >= 1.1.1)
+      ruby-saml (~> 1.3)
     omniauth-shibboleth (1.2.1)
       omniauth (>= 1.0.0)
     omniauth-twitter (1.2.1)
@@ -631,9 +631,8 @@ GEM
     ruby-fogbugz (0.2.1)
       crack (~> 0.4)
     ruby-progressbar (1.8.1)
-    ruby-saml (1.1.2)
+    ruby-saml (1.3.0)
       nokogiri (>= 1.5.10)
-      uuid (~> 2.3)
     ruby_parser (3.8.2)
       sexp_processor (~> 4.1)
     rubyntlm (0.5.2)
@@ -920,7 +919,7 @@ DEPENDENCIES
   omniauth-gitlab (~> 1.0.0)
   omniauth-google-oauth2 (~> 0.2.0)
   omniauth-kerberos (~> 0.3.0)
-  omniauth-saml (~> 1.5.0)
+  omniauth-saml (~> 1.6.0)
   omniauth-shibboleth (~> 1.2.0)
   omniauth-twitter (~> 1.2.0)
   omniauth_crowd (~> 2.2.0)