Link against Cake 0.22.0 or later

[ecampidoglio]

The addin is still referencing Cake 0.17.0, which generates this error when using with the latest version of Cake (0.23.0, at this time):

Error: The assembly 'Cake.Curl, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'
is referencing an older version of Cake.Core (0.17.0).
This assembly need to reference at least Cake.Core version 0.22.0.
Another option is to downgrade Cake to an earlier version.
It's not recommended, but you can explicitly opt-out of assembly verification
by configuring the Skip Verification setting to true
(i.e. command line parameter "--settings_skipverification=true",
environment variable "CAKE_SETTINGS_SKIPVERIFICATION=true",
read more about configuration at https://cakebuild.net/docs/fundamentals/configuration)

Cake.Curl needs to link against the newer version of Cake. Note that this means dropping support for net45 (see cake-build/cake@4fbb422).

[ecampidoglio]

Resolved in 2.0.0. 🎉