fix: Gemfile to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-RUBY-RACK-569066

Gemfile

@@ -6,7 +6,7 @@ git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 ruby '2.6.2'
 
 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
-gem 'rails', '~> 5.2.1'
+gem 'rails', '~> 5.2.3'
 # Use sqlite3 as the database for Active Record
 gem 'sqlite3'
 # Use Puma as the app server
@@ -26,19 +26,19 @@ gem 'puma', '~> 3.11'
 gem 'bootsnap', '>= 1.1.0', require: false
 
 # Use Rack CORS for handling Cross-Origin Resource Sharing (CORS), making cross-origin AJAX possible
-# gem 'rack-cors'
+# gem 'rack-cors', '>= 1.1.0'
 
 # Authentication
-gem 'devise'
-gem 'devise_token_auth'
+gem 'devise', '>= 4.7.1'
+gem 'devise_token_auth', '>= 1.1.3'
 
 gem 'rack-cors'
 
 # Interactors
 gem 'interactor'
-gem 'interactor-rails'
+gem 'interactor-rails', '>= 2.2.1'
 
-gem 'active_model_serializers'
+gem 'active_model_serializers', '>= 0.10.10'
 
 gem 'mailgun-ruby'
 
@@ -46,9 +46,9 @@ group :development, :test do
   # Call 'byebug' anywhere in the code to stop execution and get a debugger console
   gem 'byebug', platforms: %i[mri mingw x64_mingw]
   gem 'coveralls', require: false
-  gem 'factory_bot_rails'
+  gem 'factory_bot_rails', '>= 5.1.1'
   gem 'faker'
-  gem 'rspec-rails'
+  gem 'rspec-rails', '>= 3.9.0'
   gem 'shoulda-matchers'
 end
 
@@ -58,7 +58,7 @@ group :development do
   gem 'railroady'
   gem 'rubocop', '0.72.0'
   gem 'rubocop-performance'
-  gem 'rubocop-rails'
+  gem 'rubocop-rails', '>= 2.3.2'
   gem 'solargraph'
   gem 'spring'
   gem 'spring-watcher-listen', '~> 2.0.0'