Add 'logger' as dependency in gemspec

Gemfile

@@ -18,8 +18,4 @@ group :test do
   gem 'jrjackson', '~> 0.2.9', platforms: :jruby
   gem 'lines'
   gem 'thread_safe'
-
-  # Since Ruby-3.4 vendored stdlib logger warns that it will be removed
-  # Since Ruby-3.5 logger is extracted into a standalone gem
-  gem 'logger'
 end

lograge.gemspec

@@ -22,11 +22,13 @@ Gem::Specification.new do |s|
 
   s.files = `git ls-files lib LICENSE.txt`.split("\n")
 
-  # base64, bigdecimal and mutex_m were extracted from the default gems in
+  # base64, bigdecimal, logger and mutex_m were extracted from the default gems in
   # Ruby 3.4; older Rails releases still `require` them, and JRuby (which
   # targets Ruby 3.4) does not bundle them, so declare them explicitly.
+  # See: https://stdgems.org
   s.add_development_dependency 'base64'
   s.add_development_dependency 'bigdecimal'
+  s.add_development_dependency 'logger'
   s.add_development_dependency 'mutex_m'
   # rdoc 8 depends on rbs, whose C extension cannot be built on JRuby. Keep
   # rdoc on the pre-rbs line so the JRuby test matrix can bundle.