feat: added default scheduled event handler

[bflorian]

Added a default handler for scheduled events that will be called whenever there isn't a matching handler for the schedule name. This feature is useful for cases where the name is used to convey information, such as the ID of an entity.

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)
• [x] I have read the CONTRIBUTING document
• [x] My code follows the code style of this project (hint: install an xo editor plugin)
• [x] Any required documentation has been added
• [ ] I have added tests to cover my changes

[smartthingspi]

:tada: This PR is included in version 4.1.0 :tada:

The release is available on:

• GitHub release
• npm package (@latest dist-tag)

Your semantic-release bot :package::rocket: