[Security] Bump omniauth from 1.9.1 to 2.0.0

Bumps [omniauth](https://github.com/omniauth/omniauth) from 1.9.1 to 2.0.0. **This update includes a security fix.**
- [Release notes](https://github.com/omniauth/omniauth/releases)
- [Commits](https://github.com/omniauth/omniauth/compare/v1.9.1...v2.0.0)

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

Gemfile.lock

@@ -95,8 +95,11 @@ GEM
     docile (1.3.2)
     erubi (1.9.0)
     execjs (2.7.0)
-    faraday (1.0.0)
+    faraday (1.3.0)
+      faraday-net_http (~> 1.0)
       multipart-post (>= 1.2, < 3)
+      ruby2_keywords
+    faraday-net_http (1.0.1)
     ffi (1.13.1)
     font-awesome-sass (5.15.1)
       sassc (>= 1.11)
@@ -112,7 +115,7 @@ GEM
       rails-dom-testing (>= 1, < 3)
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
-    jwt (2.2.1)
+    jwt (2.2.2)
     loofah (2.7.0)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
@@ -126,7 +129,7 @@ GEM
     mini_portile2 (2.5.0)
     minitest (5.14.2)
     msgpack (1.3.3)
-    multi_json (1.14.1)
+    multi_json (1.15.0)
     multi_xml (0.6.0)
     multipart-post (2.1.1)
     mysql2 (0.5.3)
@@ -134,26 +137,29 @@ GEM
     nokogiri (1.11.1)
       mini_portile2 (~> 2.5.0)
       racc (~> 1.4)
-    oauth2 (1.4.3)
+    oauth2 (1.4.4)
       faraday (>= 0.8, < 2.0)
       jwt (>= 1.0, < 3.0)
       multi_json (~> 1.3)
       multi_xml (~> 0.5)
       rack (>= 1.2, < 3)
-    omniauth (1.9.1)
+    omniauth (2.0.0)
       hashie (>= 3.4.6)
       rack (>= 1.6.2, < 3)
-    omniauth-github (1.4.0)
-      omniauth (~> 1.5)
-      omniauth-oauth2 (>= 1.4.0, < 2.0)
-    omniauth-oauth2 (1.6.0)
-      oauth2 (~> 1.1)
-      omniauth (~> 1.9)
+      rack-protection
+    omniauth-github (2.0.0)
+      omniauth (~> 2.0)
+      omniauth-oauth2 (~> 1.7.1)
+    omniauth-oauth2 (1.7.1)
+      oauth2 (~> 1.4)
+      omniauth (>= 1.9, < 3)
     orm_adapter (0.5.0)
     popper_js (1.16.0)
     public_suffix (4.0.6)
     racc (1.5.2)
     rack (2.2.3)
+    rack-protection (2.1.0)
+      rack
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (6.0.3.4)
@@ -194,6 +200,7 @@ GEM
     responders (3.0.1)
       actionpack (>= 5.0)
       railties (>= 5.0)
+    ruby2_keywords (0.0.2)
     sassc (2.4.0)
       ffi (~> 1.9)
     sassc-rails (2.1.2)