fix: Gemfile & Gemfile.lock to reduce vulnerabilities (#22)

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

Co-authored-by: snyk-bot <[email protected]>

Author: jufemaiz

Gemfile

@@ -7,7 +7,7 @@ source 'https://rubygems.org' do
   gem 'haml'
   gem 'linguistics'
   gem 'puma'
-  gem 'rack', '>= 2.2.3.1'
+  gem 'rack', '>= 3.0.0'
   gem 'sass'
   gem 'sinatra', '>= 2.2.3'
 

Gemfile.lock

@@ -24,7 +24,7 @@ GEM
     powerpack (0.1.2)
     puma (5.6.4)
       nio4r (~> 2.0)
-    rack (2.2.4)
+    rack (3.0.0)
     rack-protection (2.2.3)
       rack
     rainbow (3.0.0)
@@ -63,7 +63,7 @@ DEPENDENCIES
   haml!
   linguistics!
   puma!
-  rack (>= 2.2.3.1)!
+  rack (>= 3.0.0)!
   rubocop!
   sass!
   sinatra (>= 2.2.3)!