Set parentID to -1 rather than worldID for consistency in flaging parent transform as dirty ...

Was recommended in a comment for a previous PR, and I've seen no negative side efffects
https://github.com/pixijs/pixi.js/pull/5030#issuecomment-441299080

Update `InteractionManager.setTargetElement` typings to `HTMLElement` (#5886)

BatchBuffer.vertices => ViewableBuffer.rawBinaryData (#5881)

Adds Graphics.pluginName & ViewableBuffer (#5877)

Typo fix (#5878)

Fixes base texture prepare (#5874)

Fix inconsistent lineStyle alignment parameter documentation (#5876)

Fixes touchmoves will now have the 'target' property set (#5695)

Fix WebGL context cannot be restored (#5872)

Update to the latest version of resource-loader (#5870)

Fix BatchRenderer types (#5871)

Adds new ImageBitmapResource (#5858)

Max FPS can be disabled by setting to 0. (#5833)

Fix BatchRenderer and GroupD8 types (#5867)

Fix RenderTexture type (#5861)

Cleanup BatchRenderer internal names and documentation (#5852) ...

I have edited the BatchRenderer class. The following major changes were
made:

1. Changed old `vertexCount` to `_flushId`. This is because the name
itself was misleading. It signified the number of flushes in the
current frame.

2. Renamed `vaos` and `vaosMax` to `_packedGeometries` and
`_packedGeometryPoolSize`. They _were not_ VAOs in the sense
that they binded all the buffers automatically to the WebGL
context. Instead, they were just reusable `BatchGeometry` objects.

3. Renamed `groups` to `_drawCalls`. That is what they are, and it
makes more sense, especially after documenting it.

4. Renamed all private variables by adding a _ prefix.

5. Added documentation to all private/public properties and methods.

6. Fixed destroy(). It was nullifying non-existent variables. They
were probably from when this class was being built/tested. I've fixed
it so that it nullifies the correct resources.

7. contextChange signal is now hooked in `BatchRenderer` rather than
the `BatchPluginFactory#create`. This makes sense since the former
is the one implementing the `contextChange` signal.

8. SIDE EFFECT: Graphics used the `shader` property of `BatchRenderer`,
and since that was deemed a private properties, it broke. It fixed that
by making Graphics use `_shader`.

9. I reordered the way in which properties are initialized in the
constructor. The most important/public ones are on the top. They are
ordered in a way that makes a new-comer sense.

10. Reordered methods. The first methods are related to rendering and
are lifecycle-type methods: contextChange, render, flush, and destroy. Then
the start and stop methods. Then the private methods getAttributeBuffer,
getIndexBuffer, and packInterleavedGeometry.

11. Renamed packGeometry to packInterleavedGeometry; this is because
the method doesn't take any geometry to put into. Rather it takes
the interleaved buffers.

12. Documented literally anything else.

Use OffscreenCanvas for measureText if available (#5804)

GroupD8 documentation (#5849)

Add JSDoc comments on PIXI.Transform (#5843)

Prevented System from attaching itself to the Renderer's contextChange signal (#5848)

Fix cacheAsBitmap filter (#5844)

Fix for the SVGResource#valid issue (#5819)

Fix the DisplayObject#cacheAsBitmap issue (#5841)

Fix RenderTexture not working on Canvas with pixi-legacy (#5840)

Change DisplayObject#hitArea type declaration to support more hit-area classes (#5827)

webgl2 extension fix (#5829)

Fixes the prepare system (#5834)

Small optimization with text and gradients (#5835)

Fix TextStyle.whiteSpace param type (#5820)

Add JSDoc comments on the TextureUvs properties (#5828)