Update danger from 8.2.1 to 8.2.2

To support Ruby 2.7 comfortably by removing the warnings:

WARNING: Please convert ObjectifiedHash object to hash before calling Hash methods on it.

Upstream changelog: https://github.com/danger/danger/blob/v8.2.2/CHANGELOG.md

## 8.2.2

* Silence the ObjectifiedHash warnings when iterating over GitLab notes. - [@dstull](https://github.com/dstull)
* Replace `URI.escape` which is obsolete in Ruby 3. - [@mataku](https://github.com/mataku)
* Fix run with Azure Pipelines as CI Source and Azure Repos Git as Request Source - [@damien-danglard](https://github.com/damien-danglard)
* Delegate explicitly keyword arguments for Ruby 3. - [@mataku](https://github.com/mataku)