v4.0.0

What's Changed

• ignore Gemfile.lock by @klriutsa in #1
• Update .travis.yml by @fabdbt in #2

New Contributors

• @klriutsa made their first contribution in #1
• @fabdbt made their first contribution in #2

Full Changelog: https://github.com/guanting112/remove_emoji/commits/v4.0.0