A library that implements a replacement fetch() function for use in Haketilo
resources. The new function delegates requests to extension's background
script. This allows some HTTP requests to be made that would normally violate
CORS rules.

See: https://hydrillabugs.koszko.org/projects/haketilo/wiki/Roadmap#5-Development-of-a-user-controlled-captcha-client-107

This library requires Hydrilla builder >= 1.1 and Haketilo >= 2.0.