[next] House-keeping for dependencies and tests (#5277) ...

* Updates internal dependencies

* Updates dependencies, removes bit-twiddle, removes circular import

* Removes render tests app

* Oops, copypasta

* Fixes Graphics tests

* Removes unused test, caches isWebGLSupported

* Revert changes to isWebGLSupported

* Use environment variable to disable WebGL tests

* Fixes env line

* Missed one!

Revert "[next] Sprite, Mesh and Graphics refactor to including in batching (#5069)" (#5127) ...

This reverts commit 4743491.

[next] Sprite, Mesh and Graphics refactor to including in batching (#5069)

Update pointerup docs to suggest mouse events when appropriate (#5079)

Workaround for JSDoc events in v3.5.5 (#4994)

v5.0.0-alpha.3

Move pointertap after pointerup for clicks (#4909)

Fix pointertap emission when sliding held mouse to a second object (#4872) ...

Fixes tests

Pedantic spelling fixes (#4797)

Allow any object to be a stencil mask. (#4776)

v5.0.0-alpha.2

Polyfill interactionData buttons property via event.which for Safari browser (#4724)

Update the mouse position in onPointerMove when using a pen tablet (#4622)

Follow W3 specs for `pointerId` mouse value (#4606) ...

See: https://www.w3.org/Submission/pointer-events/#widl-PointerEvent-pointerId

Fixes disabling interactive children outside of hitArea (#4608)

Update LICENSE files to 2018 (#4585)

removed @private from setTargetElement (#4469) ...

* removed @private from setTargetElement

this is a public method.

* Fixes linting error

Test and build system optimizations (v5) (#4460) ...

* Adds optimizations for test and build system

* Fixes cannot pass undefined to describe

* Support multiple build outputs

* Removes builder and tester internal packages

* Removes unnecessary package.json file

* Bumped buble version, sorts package.json deps

* Fixes dist command for deploying bundles

Decouple Canvas Functionality (v5) (#4429) ...

* Create canvas-renderer package

* Externalized all canvas-related functionality as packages

* Creates pixi-modern package (no canvas)
* Renames PIXI.WebGLRenderer to PIXI.Renderer
* Removes “WebGL” from class names, makes default

* Include modern build to Travis deploy

* Fixes linting issue

* Fixes app test on Travis

* Fixes Travis issues with app-loader mixin

* Add missing CanvasRenderer from accessibility tests

* More de-coupling, using _renderCanvas mixins, pixi.js inherits pixi-modern

* Re-adds missing dependency

* Re-adds other missing dependencies

* More strict comments elimination

* pixi-modern as a dependency is slow and bloated, undoing

* Fix ES global object

* Moves pixi.js to pixi.js-legacy

* Move pixi-modern to pixi.js

* Shared deprecations between bundles

* Adds unit tests for window

* Reorganized canvas and filter packages

* Renames renderWebGL functions to render

* Creates new canvas-display package for last of canvas functionality

# Conflicts:
#	bundles/pixi.js/src/index.js

* Removes preprocess, better deployment

* Removes deprecation packages, pixi.js-legacy now inherits pixi.js

Removes PIXI.ticker Namespace (v5) (#4413) ...

* Removes PIXI.ticker namespace object

* Fixes documentation

Fixes issues with build process (#4415) ...

* Fixes issues with build process

* Documentation cleanup/fixes

* Removes empty rollup config files, ES6 builder code, deprecations to builder

Improved Deprecation Strategy: Take 2 (#4410) ...

* Better deprecation strategy with bundle

* Fixes listing issues

* Optimization for Build Times with Rollup (#4411)

* Single build for both ES and CJS/UMD formats
* Simpler bundle mode
* rollup-watch is deprecated

Next Restructure for v5 (#4387) ...

* Reorganized files

* Adds new files

* Adds new files

* Updated to next-lerna

* Linting fixes, disable deprecations

* Created bundles and plugins folders

* Adds polyfill plugin

* Test pass

* Better build dest selection

* Externalized fragment shaders and vertex shaders

* Renamed plugins to packages

* Creates core package, updates Rollup version

* Reorganized pixi.js into packages

* Added packages, readmes, licenses for all packages

* Resolve minor build, dependency issues

* Ignore non-first comments with uglify

* Fixes fragment dependencies

* Adds settings, constants, utils, math, display, app

* Fixes import issues with core

* Fixes build all modules, updates deprecations

* Fixes listing issues

* Temporarily disable coverage

* Broke up tests

* Rename GeometryBuffer to Buffer

* Fixes tests for all

* Remove placeholder test

* Adds test for constants

* Add test for accessibility

* Created integrations tests

* Travis-friendly test concurrency

* Un-did concurrency for tests

* Better tester shebang

* Temporarily disable tests for mesh

* Log out floss error

* Moves filters to new filters root folder

* Combines premultiply, deprecates PIXI.extras namespace

* Documentation fixes

* Moves integration tests to tools

* TimeLimiter test is too unstable for slow environments