Bump omniauth from 1.9.1 to 1.9.2

Bumps [omniauth](https://github.com/omniauth/omniauth) from 1.9.1 to 1.9.2.
- [Release notes](https://github.com/omniauth/omniauth/releases)
- [Commits](omniauth/omniauth@v1.9.1...v1.9.2)

---
updated-dependencies:
- dependency-name: omniauth
  dependency-type: direct:production
...

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

Gemfile.lock

@@ -372,7 +372,7 @@ GEM
       multi_json (~> 1.3)
       multi_xml (~> 0.5)
       rack (>= 1.2, < 3)
-    omniauth (1.9.1)
+    omniauth (1.9.2)
       hashie (>= 3.4.6)
       rack (>= 1.6.2, < 3)
     omniauth-facebook (9.0.0)