AppCenter dSYM upload

This Bitrise step uploads dSYM to Microsoft AppCenter using official CLI.
It is relevant only for iOS project (including Xamarin.iOS).

Required Variables

• dsym_path: a path to dSYM file, by default it's $BITRISE_DSYM_PATH which is usually generated by the build phase
• app_id: an application identifier that is a combination of your Organization/OwnerName and Application Name. For example: MyOrganization/MyApplication
• api_token: AppCenter API Token. It should be stored in Secrets. Can be obtained here: https://appcenter.ms/settings/apitokens