FYI: Breaking change in 2.1

[SCullman]

The simple and banal switch of the alias for BodyInit from U2 to U3 broke Thoth.Fetch.
Fix is here: thoth-org/Thoth.Fetch#3

[alfonsogarciacaro]

Ups, I was hoping that everybody would be using the !^ operator but apparently it was not the case :/