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: direct:production
...

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

Gemfile.lock

@@ -98,7 +98,7 @@ GEM
       sass (>= 3.3.0, < 3.5)
     globalid (0.4.2)
       activesupport (>= 4.2.0)
-    hashie (4.1.0)
+    hashie (5.0.0)
     i18n (1.8.5)
       concurrent-ruby (~> 1.0)
     jquery-rails (4.4.0)
@@ -141,7 +141,7 @@ GEM
     nio4r (2.5.4)
     nokogiri (1.10.10)
       mini_portile2 (~> 2.4.0)
-    omniauth (1.9.1)
+    omniauth (1.9.2)
       hashie (>= 3.4.6)
       rack (>= 1.6.2, < 3)
     omniauth-browserid (0.0.1)
@@ -159,7 +159,7 @@ GEM
     public_suffix (4.0.6)
     puma (5.0.0)
       nio4r (~> 2.0)
-    rack (2.2.3)
+    rack (2.2.4)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (5.1.7)
@@ -322,6 +322,7 @@ DEPENDENCIES
   rubocop
   rubocop-faker
   sass-rails
+  sassc (~> 2.1.0)
   shoulda-matchers (~> 3.1)
   simplecov
   slim-rails