fix: Gemfile & Gemfile.lock to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-RUBY-RACK-1061917

Gemfile

@@ -41,7 +41,7 @@ gem 'redis', '~> 4.2'
 gem 'jwt', '~> 2.2.2'
 gem 'oauth', '~> 0.5.1'
 
-gem 'doorkeeper', '~> 5.6.6'
+gem 'doorkeeper', '~> 5.6.7'
 gem 'repost', '~> 0.3.8'
 
 gem 'lodash-rails'

Gemfile.lock

@@ -139,7 +139,7 @@ GEM
     docile (1.4.0)
     domain_name (0.5.20190701)
       unf (>= 0.0.5, < 1.0.0)
-    doorkeeper (5.6.6)
+    doorkeeper (5.6.7)
       railties (>= 5)
     dotenv (2.8.1)
     dotenv-rails (2.8.1)
@@ -220,7 +220,7 @@ GEM
       activesupport (>= 4)
       railties (>= 4)
       request_store (~> 1.0)
-    loofah (2.21.3)
+    loofah (2.22.0)
       crass (~> 1.0.2)
       nokogiri (>= 1.12.0)
     mail (2.8.1)
@@ -231,7 +231,7 @@ GEM
     marcel (1.0.2)
     method_source (1.0.0)
     mini_mime (1.1.5)
-    mini_portile2 (2.8.4)
+    mini_portile2 (2.8.5)
     minitest (5.20.0)
     minitest-stub_any_instance (1.0.3)
     multi_json (1.15.0)
@@ -246,10 +246,10 @@ GEM
     net-smtp (0.3.3)
       net-protocol
     nio4r (2.5.9)
-    nokogiri (1.15.4)
+    nokogiri (1.15.5)
       mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
-    nokogiri (1.15.4-x86_64-linux)
+    nokogiri (1.15.5-x86_64-linux)
       racc (~> 1.4)
     oauth (0.5.14)
     oauthenticator (1.4.1)
@@ -268,7 +268,7 @@ GEM
     public_suffix (5.0.3)
     puma (6.3.1)
       nio4r (~> 2.0)
-    racc (1.7.1)
+    racc (1.7.3)
     rack (2.2.8)
     rack-test (2.1.0)
       rack (>= 1.3)
@@ -301,7 +301,7 @@ GEM
       rake (>= 12.2)
       thor (~> 1.0)
     rainbow (3.1.1)
-    rake (13.0.6)
+    rake (13.1.0)
     rb-fsevent (0.11.2)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
@@ -395,7 +395,7 @@ GEM
       tins (~> 1.0)
     terser (1.1.17)
       execjs (>= 0.3.0, < 3)
-    thor (1.2.2)
+    thor (1.3.0)
     tilt (2.2.0)
     timeout (0.4.0)
     tins (1.32.1)
@@ -423,7 +423,7 @@ GEM
     websocket-driver (0.7.6)
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.5)
-    zeitwerk (2.6.11)
+    zeitwerk (2.6.12)
 
 PLATFORMS
   ruby
@@ -437,7 +437,7 @@ DEPENDENCIES
   byebug
   coffee-rails (~> 5.0, >= 5.0.0)
   coveralls
-  doorkeeper (~> 5.6.6)
+  doorkeeper (~> 5.6.7)
   dotenv-rails
   faraday
   font-awesome-sass (~> 6.4.0)
@@ -474,3 +474,6 @@ DEPENDENCIES
   tzinfo-data
   web-console (>= 4.2.1)
   webmock
+
+BUNDLED WITH
+   2.1.4