message: Update CHANGES.md with changes since 1.0.0
diff: # Change Log
  +### v?.?.? - ?
  +
  +- Changed the log level for the tile selection output from `Display` to `Verbose`. With default settings, the output will no longer be displayed in the console, but only written to the log file.
  +- Added MacOS support: The build- and plugin files have been updated to support the `Mac` platform.
  +- Added support for the legacy `gltfUpAxis` property in a tileset `asset` dictionary. Although this property is **not** part of the specification, there are many existing assets that use this property and had been shown with a wrong rotation otherwise.
  +
  ### v1.0.0 - 2021-03-30 - Initial Release
  ##### Features :tada:
  