Publish 2.0.0 to RubyGems #72

Hi @SamSaffron ! Thanks for maintaining mini_mime.

2.0.0 looks released in the repo, but it isn't on RubyGems yet:

• Release version 2.0.0 #67 ("Release version 2.0.0") was merged on 2026-09-02, and main has MiniMime::VERSION = "2.0.0" and a 2.0.0 entry in CHANGELOG.
• https://rubygems.org/gems/mini_mime still shows 1.1.5 (2023-08-08) as the latest version, and /api/v2/rubygems/mini_mime/versions/2.0.0.json returns 404.
• There is no v2.0.0 tag or GitHub release; the latest tag is v1.1.5.

Could you push the gem (and the v2.0.0 tag) when you get a chance? We'd like to pick up the refreshed MIME database and the Unicode/byte-offset lookup fixes, and we'd rather not point our Gemfile at a git
ref.

Thanks!