Bump omniauth-github from 1.4.0 to 2.0.0

Bumps [omniauth-github](https://github.com/intridea/omniauth-github) from 1.4.0 to 2.0.0.
- [Release notes](https://github.com/intridea/omniauth-github/releases)
- [Commits](omniauth/omniauth-github@v1.4.0...v2.0.0)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Gemfile.lock

@@ -13,21 +13,24 @@ GEM
       xpath (~> 3.2)
     diff-lcs (1.3)
     dotenv (2.7.6)
-    faraday (1.0.1)
+    faraday (1.3.0)
+      faraday-net_http (~> 1.0)
       multipart-post (>= 1.2, < 3)
+      ruby2_keywords
+    faraday-net_http (1.0.1)
     github-markup (3.0.4)
     hashie (4.1.0)
-    jwt (2.2.1)
+    jwt (2.2.2)
     mini_mime (1.0.2)
     mini_portile2 (2.4.0)
-    multi_json (1.14.1)
+    multi_json (1.15.0)
     multi_xml (0.6.0)
     multipart-post (2.1.1)
     mustermann (1.1.1)
       ruby2_keywords (~> 0.0.1)
     nokogiri (1.10.9)
       mini_portile2 (~> 2.4.0)
-    oauth2 (1.4.3)
+    oauth2 (1.4.4)
       faraday (>= 0.8, < 2.0)
       jwt (>= 1.0, < 3.0)
       multi_json (~> 1.3)
@@ -36,15 +39,16 @@ GEM
     octokit (4.18.0)
       faraday (>= 0.9)
       sawyer (~> 0.8.0, >= 0.5.3)
-    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)
     public_suffix (4.0.5)
     rack (2.2.3)
     rack-protection (2.0.8.1)