Before loading any of the API structs, look for version "1.3" and abort if found

[ghost]

The core team does not care about semver, and have decided to change all the API structs retroactively. This will break everything horribly. Luckily they left us a tiny window of sanity by adding a new "1.3` version. We will use this to tell if the host is Godot 4.0, and abort since we aren't supporting it yet.

[follower]

FYI, your pleas seem to have been listened to:

• Bringing the master branch in line with Godot master godotengine/godot-headers#75 (comment)

• GDNative: merge API structs, bump version of merged structs. godotengine/godot#39183

• GDNative: Add bindings for the Packed*Array ptr() and ptrw() functions. godotengine/godot#39064

However, you may also be interested in / impacted by these:

• Provide tag for 3.2 and 3.2.1 godotengine/godot-headers#70

• [GDNative] Rethink the backward compatibily for Godot classes & ptrcall godotengine/godot#35464