Fixes error when running tests

Error uninitialized constant ActiveSupport::LoggerThreadSafeLevel::Logger (NameError)

Author: matyikriszta

config/boot.rb

@@ -1,4 +1,5 @@
 ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../Gemfile', __dir__)
 
 require "bundler/setup" # Set up gems listed in the Gemfile.
+require "logger" # Fix concurrent-ruby removing logger dependency which Rails itself does not have
 require "bootsnap/setup" # Speed up boot time by caching expensive operations.