Summary

This pull request changes the behavior of listener function registration by app.shorcut(str, regexp) to make it compatible with Bolt for JS. If a given argument is either a string or regular expression value, its generated listener matcher accepts both global and message shortcut requests.

Category (place an x in each of the [ ])

• slack_bolt.App and/or its core components
• slack_bolt.async_app.AsyncApp and/or its core components
• Adapters in slack_bolt.adapter

Requirements (place an x in each [ ])

Please read the Contributing guidelines and Code of Conduct before creating this issue or pull request. By submitting, you are agreeing to those rules.

• I've read and understood the Contributing Guidelines and have done my best effort to follow them.
• I've read and agree to the Code of Conduct.
• I've run ./scripts/run_tests.sh after making the changes.