imgix Legacy API Deprecation

[heyitsbryanm]

Following the imgix deprecation announcement for the legacy API, imgix is scheduled to deprecate legacy endpoints by March 31rst, 2021.

This deprecation affects the following endpoints:

• https://api.imgix.com/v2/image/purger
• https://api.imgix.com/v2/account/reports

One of these endpoints was detected in this repository. To ensure that API calls to imgix do not fail, it's crucial to migrate to the new imgix API by following this guide:
https://docs.imgix.com/setup/legacy-api-migration-guide

Note that this concerns only the endpoints aforementioned endpoints. The rendering API will not be affected.