raylib-d version 4.2.0 released!

[Steven Schveighoffer]

I just released version 4.2.0 of the [raylib-d 
binding](https://code.dlang.org/packages/raylib-d).

[Release notes](https://github.com/schveiguy/raylib-d/releases/tag/v4.2.0):

* Raylib binding now updated to reflect version 4.2.0 of the C library
* Include new `validateRaylibBinding` functionality -- please utilize 
this to avoid memory corruption!
* Moved all modules into a package to avoid namespace collisions
* deprecate very outdated raygui binding
* `easings` module now called `raylib.reasings` module to reflect the 
upstream change (raylib removed this module from the standard package, 
and put it as a header only include under "other")
* removed dependency on fluent asserts (and all that it depended on)

Please file any issues on the github project.

-Steve