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](https://github.com/omniauth/omniauth/compare/v1.9.1...v1.9.2)

---
updated-dependencies:
- dependency-name: omniauth
  dependency-type: indirect
...

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

Gemfile.lock

@@ -146,7 +146,7 @@ GEM
       html2haml (>= 1.0.1)
       railties (>= 4.0.1)
     hashdiff (0.3.4)
-    hashie (4.1.0)
+    hashie (5.0.0)
     hirb (0.7.3)
     html2haml (2.2.0)
       erubis (~> 2.7.0)
@@ -232,7 +232,7 @@ GEM
       scrivener (~> 0.0.3)
     ohm-expire (0.1.3.2)
       ohm (>= 0.1.5)
-    omniauth (1.9.1)
+    omniauth (1.9.2)
       hashie (>= 3.4.6)
       rack (>= 1.6.2, < 3)
     omniauth-github (1.3.0)