v2.1.1 Clean up webhook code for line things

What's Changed

LINE Things has been closed. In this release we removed the following LINE Things related webhook code

• ThingsEvent
• ThingsContent
• LinkThingsContent
• UnlinkThingsContent
• ScenarioResultThingsContent
• ScenarioResult
• ActionResult

As noted in the README, deletions tied to a business shutdown are shipped as a patch version, not a major version. If your code still references any of these code, they will never be emitted again, so you should remove them.

• Bye line things by @github-actions[bot] in #644
• Bye line things by @Yang-33 in #643

Dependency updates

• Update dependency node to v22 by @renovate[bot] in #639
• Update actions/checkout action to v4.3.0 by @renovate[bot] in #640
• Update actions/checkout action to v5 by @renovate[bot] in #641
• Update ruby/setup-ruby action to v1.255.0 by @renovate[bot] in #642

Full Changelog: v2.1.0...v2.1.1

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This release is prepared by @Yang-33