Update lwjgl from 3.2.3 to 3.3.0

[Illithidek]

Update lwjgl from 3.2.3 to 3.3.0
In order to use imgui-java with the lwjgl 3.3.0 without errors there is need for an update.
To remove code duplication when changing dependencies,
an lwjgl.bom variable was added.
Fixes: #95

• update lwjgl version from 3.2.3 to 3.3.0 across all submodules

[tlf30]

It would be handy if there was a common lwjglVersion variable in the root build.gradle that was used instead of hard coding the version in multiple places.

[Illithidek]

I can change it but tommorow :)!

[Illithidek]

@SpaiR @tlf30 Bump, I added dependencies.gradle which could have similar variables in the future :)

[SpaiR]

@Illithidek Hi! I've went through the PR and for me it seems a little bit over designed. I would likely prefer something more straightforward. For example, declare an ext block in the root build.gradle file and to define all deps there. Without hiding dependencies under custom props and additional buildscripts. Only handling of the common versioning. I know that it's a point to consider and a matter of taste. Thus, if you don't want to go with another solution, this is fine to revert the PR to the initial commit. Going only with an lwjgl update will be totally ok.

[Illithidek]

@SpaiR That was a mechanism that I use in other projects, but if you want it simpler, then I've just simplified it for you :).
Let me know if you have any other feedback!