[Security] Bump omniauth from 1.9.1 to 2.0.1

Bumps [omniauth](https://github.com/omniauth/omniauth) from 1.9.1 to 2.0.1. **This update includes a security fix.**
- [Release notes](https://github.com/omniauth/omniauth/releases)
- [Commits](https://github.com/omniauth/omniauth/compare/v1.9.1...v2.0.1)

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

Gemfile.lock

@@ -66,7 +66,7 @@ GEM
       execjs
     bcrypt (3.1.16)
     bindex (0.8.1)
-    bootsnap (1.7.0)
+    bootsnap (1.5.1)
       msgpack (~> 1.0)
     bootstrap (4.5.3)
       autoprefixer-rails (>= 9.1.0)
@@ -136,7 +136,7 @@ GEM
     mini_mime (1.0.2)
     mini_portile2 (2.5.0)
     minitest (5.14.3)
-    msgpack (1.4.2)
+    msgpack (1.3.3)
     multi_json (1.15.0)
     multi_xml (0.6.0)
     multipart-post (2.1.1)
@@ -212,7 +212,7 @@ GEM
       actionpack (>= 5.0)
       railties (>= 5.0)
     rexml (3.2.4)
-    ruby2_keywords (0.0.4)
+    ruby2_keywords (0.0.2)
     sassc (2.4.0)
       ffi (~> 1.9)
     sassc-rails (2.1.2)