Bump omniauth from 1.9.2 to 2.0.0

Bumps [omniauth](https://github.com/omniauth/omniauth) from 1.9.2 to 2.0.0.
- [Release notes](https://github.com/omniauth/omniauth/releases)
- [Commits](https://github.com/omniauth/omniauth/compare/v1.9.2...v2.0.0)

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

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

Gemfile

@@ -63,7 +63,7 @@ gem 'pg_search'
 
 # authentication
 gem 'devise', '>= 4.6.0'
-gem 'omniauth', '~> 1.9.2'
+gem 'omniauth', '~> 2.0.0'
 gem 'omniauth-oauth2'
 gem 'omniauth_openid_connect'
 gem 'omniauth-rails_csrf_protection', '~> 0.1'

Gemfile.lock

@@ -243,17 +243,17 @@ GEM
       multi_xml (~> 0.5)
       rack (>= 1.2, < 3)
     oj (3.10.5)
-    omniauth (1.9.2)
+    omniauth (2.0.0)
       hashie (>= 3.4.6)
       rack (>= 1.6.2, < 3)
-    omniauth-oauth2 (1.6.0)
-      oauth2 (~> 1.1)
-      omniauth (~> 1.9)
+      rack-protection
+    omniauth-oauth2 (1.8.0)
+      oauth2 (>= 1.4, < 3)
+      omniauth (~> 2.0)
     omniauth-rails_csrf_protection (0.1.2)
       actionpack (>= 4.2)
       omniauth (>= 1.3.1)
-    omniauth_openid_connect (0.4.0)
-      addressable (~> 2.5)
+    omniauth_openid_connect (0.6.1)
       omniauth (>= 1.9, < 3)
       openid_connect (~> 1.1)
     openid_connect (1.3.0)
@@ -306,6 +306,8 @@ GEM
       httpclient
       json-jwt (>= 1.11.0)
       rack (>= 2.1.0)
+    rack-protection (3.0.5)
+      rack
     rack-proxy (0.7.6)
       rack
     rack-test (2.0.2)
@@ -528,7 +530,7 @@ DEPENDENCIES
   mini_magick
   minitest-reporters
   oj
-  omniauth (~> 1.9.2)
+  omniauth (~> 2.0.0)
   omniauth-oauth2
   omniauth-rails_csrf_protection (~> 0.1)
   omniauth_openid_connect