Bump omniauth-saml from 2.2.1 to 2.2.2

Bumps [omniauth-saml](https://github.com/omniauth/omniauth-saml) from 2.2.1 to 2.2.2.
- [Release notes](https://github.com/omniauth/omniauth-saml/releases)
- [Changelog](https://github.com/omniauth/omniauth-saml/blob/v2.2.2/CHANGELOG.md)
- [Commits](omniauth/omniauth-saml@v2.2.1...v2.2.2)

---
updated-dependencies:
- dependency-name: omniauth-saml
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -390,7 +390,7 @@ GEM
     omniauth-rails_csrf_protection (1.0.2)
       actionpack (>= 4.2)
       omniauth (~> 2.0)
-    omniauth-saml (2.2.1)
+    omniauth-saml (2.2.2)
       omniauth (~> 2.1)
       ruby-saml (~> 1.17)
     open4 (1.3.4)