Merge remote-tracking branch 'upstream/dev' into more_container_tests

use worldAlpha

TilingSprite BaseTexture resolution ...

I ran into a problem if the base texture resolution is not 1 and the renderer is not WebGL. The resolution auf the base texture is nowhere considered. This is how i solved it. The solution is probably not the best...

Fixes for #2791 , with tests

Update docs: issue #3085 ...

#3090: Putting this out here. After encountering #3085 this is what I found. Please feel free to revise as needed, as I admit my knowledge on the matter is limited. I hope it helps someone else.

Merge pull request #3073 from gameofbombs/dev4 ...

Mesh refactoring - move renderer away

blur typo

remove superfluous check

Mesh refactoring - move renderer away

Bypass the getter / setter for anchor inside Sprite

Merge pull request #3065 from englercj/context-fix ...

Restore lost context before using it

Removed arrow functions as they mess with scope (this. is undefined) (#3067) ...

* ensure canvas is non po2 when created as this currently automatically sets it to repeat wrap mode. Not something we want as this texture resizes often and not likely need to be wrapped

* Revert "ensure canvas is non po2 when created as this currently automatically sets it to repeat wrap mode. Not something we want as this texture resizes often and not likely need to be wrapped"

This reverts commit 7433680.

* removed arrow functions as they mess with scope (this. is undefined)

* ran aslant fix

* aslint fixes

* back you go quoties!

use `export *` syntax for deprecation so it runs first

deprecation properties need to be enumerable

Restore lost context before using it; fixes #2958 ...

Looks like since we call loseContext() on `WebGLRenderer#destroy()` that
if you create another WebGLRenderer with the same canvas the browser will
recycle that lost context and return it.

This means when we try to use the context it is actually in a lost state.
This change tries to restore a lost context before we use it. It also adds
a debug assert at one location that will be invalid if the context is
invalid.

remove some lingering events from interaction manager

mix in deprecations sooner; fixes #3062

Merge pull request #3060 from englercj/fix-image-url-detect ...

Replace url extension regex

various fixes

fixes for @englercj

remove some changes from texture

1. moved clamping into TextureTransform ...

2. texture now has an optional component

some restructuring

Clamping is magic

clamping is hilarious ...

THIS IS THE PAIN

fix crash in constructor

Giant tilingSprite refactoring. ...

1. Rotated and trimmed textures are allowed
2. "full" textures use simple shader if they have WRAP_MODE.REPEAT
3. WRAP_MODE.REPEAT is forced if that texture uploads in TilingSprite first time
4. TilingSprite now has tileTransform which applies to the "zero tile" like if its been a child

replace url extension regex; fixes #3059

Improvement of PR #3053

Merge pull request #3053 from staff0rd/addChildAt_fix ...

Allow Container.addChildAt when zero children