v0.3.2

Upgraded rexml dependency to 3.2.8 to address CVE-2024-35176
https://www.ruby-lang.org/en/news/2024/05/16/dos-rexml-cve-2024-35176/

v0.3.1

This release contains:

• Improved documentation in README
• Improved unit tests
• Added MIT license to gemspec
• Upgraded rexml dependency to 3.2.5

v0.3.0

Previously, you could prefix the subject line with static text:

Mail.register_interceptor(
  RecipientInterceptor.new(
    ENV["EMAIL_RECIPIENTS"],
    subject_prefix: "[staging]",
  ),
)

Now, you still prefix with static text.
Or, you can use a proc to prefix the subject line
with contents from the original message:

Mail.register_interceptor(
  RecipientInterceptor.new(
    ENV["EMAIL_RECIPIENTS"],
    subject_prefix: proc { |msg| "[staging] [#{(msg.to + msg.cc + msg.bcc).sort.join(",")}]" }
  ),
)

The object passed to the proc is an instance of
Mail::Message.