Update LibGDX to version 1.9.14

[BenjaminAmos]

Description

This pull request updates LibGDX to version 1.9.14.

To see what has changed you can view the release notes for interim LibGDX versions:

• LibGDX 1.9.10
• LibGDX 1.9.11
• LibGDX 1.9.12
• LibGDX 1.9.13
• LibGDX 1.9.14

In terms of breaking LibGDX API changes:

• InputProcessor scrolled method now receives scroll amount for X and Y. Changed type to float to support devices which report fractional scroll amounts. Updated InputEvent in scene2d accordingly: added scrollAmountX, scrollAmountY attributes and corresponding setters and getters (#6154).
• Vector2 angleRad(Vector2) now correctly returns counter-clockwise angles (#5428).
• getDeltaTime() now returns the raw delta time instead of a smoothed one on Android (#6228).
• Gdx.files.external on Android now uses app external storage (File handling).
• HeadlessApplicationConfiguration#renderInterval was changed to #updatesPerSecond

The gdx-controllers library has changed its versioning, so it no longer shares a version number with its corresponding LibGDX release. The version numbers have therefore been changed in the corresponding gradle files that use them.

I found that the libGdxVersion variable was being defined seperately in two different gradle files, so I removed the variables from config/gradle/common.gradle so that they are all defined in the same file (build.gradle in the root directory). I assumed that all variables in an allprojects block are applied to all sub-projects recursively of the root project.

Testing

• Build the game, which should not display any compile errors.
• Run the game and test things as usual
• If possible, try using all the avaliable input modes (Keyboard, Keyboard+Mouse and Controller)
• If possible, try doing this using both the android and desktop facades

This should not require any android changes, as it uses the gradle gdxVersion variable rather than hard-coding the version used.

Notes

LibGDX 1.9.13 introduced the foregroundFPS setting for the LWJGL3 back-end, which was previously present in the LWJGL2 back-end. I have not used it for now though as there is no equivalent code for the android back-end.

This depends on MovingBlocks/TeraNUI#68, as there can only be one version of LibGDX present on the classpath (and the newer versions have ABI-breaking changes in them).

[Cervator]

Tests out locally on both PC and Android :-) Merging!