message: Update changelog for undescribed breaking changes in 0.22
diff: See [internal-docs/custom-themes.md](https://github.com/TypeStrong/typedoc/blob/v0.22.0/internal-docs/custom-themes.md) for documentation on how to create a custom theme in v0.22.
  - Removed the minimal theme that has been mostly broken for a long time.
  - Changed the default `entryPointStrategy` from `expand` to `resolve`.
  +- Paths in config files will now be resolved relative to the config file instead of relative to the current working directory.
  +- Exclude patterns are now checked against files instead of against each part of the path as traversed, #1399.
  + This means that an exclude of `**/someDir` will **not** exclude files in that directory. To exclude files in a directory, specify `**/someDir/**`.
  ### Features
  