stripe is missing a gem dependency on logger. When including stripe in
a Gemfile, if logger is not specified directly or included transitively
by another gem, this warns in verbose mode on Ruby 3.4, and results in
an error on Ruby 4.0.  Example file:

```
require 'bundler/inline'

gemfile do
  source 'https://rubygems.org'
  gem 'stripe'
end

require "stripe"
```

Running on Ruby 4.0.2:

```
$ ruby -v; ruby t.rb
ruby 4.0.2 (2026-03-17 revision d3da9fec82) +PRISM [x86_64-linux]
/home/jeremy/.local/share/mise/installs/ruby/4.0.2/lib/ruby/gems/4.0.0/gems/stripe-18.4.2/lib/stripe.rb:7: warning: logger used to be loaded from the standard library, but is not part of the default gems since Ruby 4.0.0.
You can add logger to your Gemfile or gemspec to fix this error.
/home/jeremy/.local/share/mise/installs/ruby/4.0.2/lib/ruby/4.0.0/bundler/runtime.rb:71:in 'block (2 levels) in Bundler::Runtime#require': There was an error while trying to load the gem 'stripe'. (Bundler::GemRequireError)
Gem Load Error is: cannot load such file -- logger
Backtrace for gem load error is:
/home/jeremy/.local/share/mise/installs/ruby/4.0.2/lib/ruby/4.0.0/bundled_gems.rb:60:in 'Kernel.require'
/home/jeremy/.local/share/mise/installs/ruby/4.0.2/lib/ruby/4.0.0/bundled_gems.rb:60:in 'block (2 levels) in Kernel#replace_require'
/home/jeremy/.local/share/mise/installs/ruby/4.0.2/lib/ruby/gems/4.0.0/gems/stripe-18.4.2/lib/stripe.rb:7:in '<top (required)>'
/home/jeremy/.local/share/mise/installs/ruby/4.0.2/lib/ruby/4.0.0/bundled_gems.rb:60:in 'Kernel#require'
/home/jeremy/.local/share/mise/installs/ruby/4.0.2/lib/ruby/4.0.0/bundled_gems.rb:60:in 'block (2 levels) in Kernel.replace_require'
/home/jeremy/.local/share/mise/installs/ruby/4.0.2/lib/ruby/4.0.0/bundler/runtime.rb:63:in 'block (2 levels) in Bundler::Runtime#require'
/home/jeremy/.local/share/mise/installs/ruby/4.0.2/lib/ruby/4.0.0/bundler/runtime.rb:58:in 'Array#each'
/home/jeremy/.local/share/mise/installs/ruby/4.0.2/lib/ruby/4.0.0/bundler/runtime.rb:58:in 'block in Bundler::Runtime#require'
/home/jeremy/.local/share/mise/installs/ruby/4.0.2/lib/ruby/4.0.0/bundler/runtime.rb:52:in 'Array#each'
/home/jeremy/.local/share/mise/installs/ruby/4.0.2/lib/ruby/4.0.0/bundler/runtime.rb:52:in 'Bundler::Runtime#require'
/home/jeremy/.local/share/mise/installs/ruby/4.0.2/lib/ruby/4.0.0/bundler/inline.rb:91:in 'block in Object#gemfile'
/home/jeremy/.local/share/mise/installs/ruby/4.0.2/lib/ruby/4.0.0/bundler/settings.rb:143:in 'Bundler::Settings#temporary'
/home/jeremy/.local/share/mise/installs/ruby/4.0.2/lib/ruby/4.0.0/bundler/inline.rb:60:in 'Object#gemfile'
t.rb:3:in '<main>'
Bundler Error Backtrace:

        from /home/jeremy/.local/share/mise/installs/ruby/4.0.2/lib/ruby/4.0.0/bundler/runtime.rb:58:in 'Array#each'
        from /home/jeremy/.local/share/mise/installs/ruby/4.0.2/lib/ruby/4.0.0/bundler/runtime.rb:58:in 'block in Bundler::Runtime#require'
        from /home/jeremy/.local/share/mise/installs/ruby/4.0.2/lib/ruby/4.0.0/bundler/runtime.rb:52:in 'Array#each'
        from /home/jeremy/.local/share/mise/installs/ruby/4.0.2/lib/ruby/4.0.0/bundler/runtime.rb:52:in 'Bundler::Runtime#require'
        from /home/jeremy/.local/share/mise/installs/ruby/4.0.2/lib/ruby/4.0.0/bundler/inline.rb:91:in 'block in Object#gemfile'
        from /home/jeremy/.local/share/mise/installs/ruby/4.0.2/lib/ruby/4.0.0/bundler/settings.rb:143:in 'Bundler::Settings#temporary'
        from /home/jeremy/.local/share/mise/installs/ruby/4.0.2/lib/ruby/4.0.0/bundler/inline.rb:60:in 'Object#gemfile'
        from t.rb:3:in '<main>'
/home/jeremy/.local/share/mise/installs/ruby/4.0.2/lib/ruby/4.0.0/bundled_gems.rb:60:in 'Kernel.require': cannot load such file -- logger (LoadError)
        from /home/jeremy/.local/share/mise/installs/ruby/4.0.2/lib/ruby/4.0.0/bundled_gems.rb:60:in 'block (2 levels) in Kernel#replace_require'
        from /home/jeremy/.local/share/mise/installs/ruby/4.0.2/lib/ruby/gems/4.0.0/gems/stripe-18.4.2/lib/stripe.rb:7:in '<top (required)>'
        from /home/jeremy/.local/share/mise/installs/ruby/4.0.2/lib/ruby/4.0.0/bundled_gems.rb:60:in 'Kernel#require'
        from /home/jeremy/.local/share/mise/installs/ruby/4.0.2/lib/ruby/4.0.0/bundled_gems.rb:60:in 'block (2 levels) in Kernel.replace_require'
        from /home/jeremy/.local/share/mise/installs/ruby/4.0.2/lib/ruby/4.0.0/bundler/runtime.rb:63:in 'block (2 levels) in Bundler::Runtime#require'
        from /home/jeremy/.local/share/mise/installs/ruby/4.0.2/lib/ruby/4.0.0/bundler/runtime.rb:58:in 'Array#each'
        from /home/jeremy/.local/share/mise/installs/ruby/4.0.2/lib/ruby/4.0.0/bundler/runtime.rb:58:in 'block in Bundler::Runtime#require'
        from /home/jeremy/.local/share/mise/installs/ruby/4.0.2/lib/ruby/4.0.0/bundler/runtime.rb:52:in 'Array#each'
        from /home/jeremy/.local/share/mise/installs/ruby/4.0.2/lib/ruby/4.0.0/bundler/runtime.rb:52:in 'Bundler::Runtime#require'
        from /home/jeremy/.local/share/mise/installs/ruby/4.0.2/lib/ruby/4.0.0/bundler/inline.rb:91:in 'block in Object#gemfile'
        from /home/jeremy/.local/share/mise/installs/ruby/4.0.2/lib/ruby/4.0.0/bundler/settings.rb:143:in 'Bundler::Settings#temporary'
        from /home/jeremy/.local/share/mise/installs/ruby/4.0.2/lib/ruby/4.0.0/bundler/inline.rb:60:in 'Object#gemfile'
        from t.rb:3:in '<main>'
```

This is simple to fix by including logger as a gem dependency.