fix negative width/height of rectangle (#4074)

Fixes clear error on CanvasRenderer with no child container (#4065) ...

* Fixes clear error on CanvasRenderer with no child container
https://github.com/pixijs/pixi.js/issues/4045

* Unit tests to check that .clear() can be called on a freshly created renderer with no containers added

* Wrapped WebGL test in withGL

fix for issue #4043: CORS not working with PIXI.Sprite.fromImage (#4050)

Adds unit-test for graphic hole (#4030)

Fixes Loader overriding destroy with removeView arg (#4018)

modularized removeItems #3939 (#3977)

Removed unit test for deprecated Texture cache functions (#3970)

Fixes priority adding of ticker listeners (#3958)

Fixes issue with addOnce on ticker (#3938)

Fix destroyed textures throwing errors when destroyed again. (#3931)

Measure Text API, expanded (#3921) ...

* Added TextStyle.measure function (Applies to https://github.com/pixijs/pixi.js/issues/3903).

* Moved measure function from TextStyle to Text and made static.

* Updated JSDocs.

* Updated JSDocs again.

* Updates based on suggestions by @bigtimebuddy in PR.

* Created PIXI.MeasuredText to capture all the information for measuring text.

* Fixes for ESLint

* Fixes for ESLint

* Added PIXI prefix to returning MeasuredText.

* Added import for MeasuredText in Text.js.

* Refactored MeasuredText to TextMetrics and moved `measure` function into it.

* Forgot to move Text.wordWrap to TextMetrics.wordWrap

* Further cleanup of TextMetrics.

* Fixes suggested by @bigtimebuddy

* Removed clone and equals from TextMetrics as they are unnecessary.

* Destructured references to TextMetrics instance in Text and privatized TextMetrics.wordWrap.

* Deprecates calculateFontProperties & getFontStyle

* Moved getFontStyle to TextMetrics

* Made toFontString method on TextStyle

* Cache calls made to context.measureText for individual characters

* Use a smaller (10x10) canvas for TextMetrics

Improvements to how and what is stored in the texture caches. (#3834) ...

* Improvements to how and what is stored in the texture caches.
Built upon the good work from https://github.com/pixijs/pixi.js/pull/3789
+ For Text, the base textures were in the BaseTextureCache, but textures weren't in the TextureCache. This has been fixed
+ Now able to tell the BaseTexture the origin of where the canvas being passed through has come from. ie. was it from the text class? was it from the graphic class? was it from caching as a bitmap? More information now to track where these canvases (canvii??) have been generated from
+ BaseTexture has addBaseTextureToCache and removeBaseTextureFromCache functions, to match regular Texture. Any adding or removing to the BaseTextureCache is now through these functions

! Breaking change. When you call Texture.fromTextureFromCache - it no longer automatically removes it's base texture from the base texture cache. Not sure how people feel about this

? I don't like lines 233 to 236 in Texture.js, and line 591 in BaseTexture.js - I don't see why they are there or why they are needed, but I chickened out on removing them!

* Renaming function to more generic names

* Adding deprecation layer

* Fixed trying to add texture to BaseTexture cache causing unit test fail

* Fixed reading from the wrong cache

* Able to remove textures and base textures from their caches via object instances
Added debug warning if trying to add a texture to a cache id that already exists
Added unit tests

* Default string for texture origin

* Different object creation style

* textureCacheId is now an array of potential entries

* textureCacheId changed to textureCacheIds

* Removed unneeded string creation

Hot-fix for Ticker's destroy (#3904) ...

* Fixes an issue when destroying ticker on callback

* Handles more cases when destroying

Adds Ticker priority argument (#3859) ...

* Adds ticker priority

* Removes EventEmitter dependency from ticker

* Small optimization to avoid Function.call

* Changes ticker priority with UPDATE_PRIORITY const

* Fixes linting

* Use a linked list approach to ticker listeners

* Oops fixes test

* Minor fixes

* Removes unnecessary destroy check

* Minor optimizations

* Adds memory clean-up to Ticker

* Updated documentation

* Rename local `last` to `previous`

Small Texture Cache enhancements (#3789) ...

* Textures track cache id and remove from cache in destroy.

* Added tests related to texture cache contents.

resolves #3783 (#3786)

Added core tests for Matrix, Ellipse, Circle and TilingSprite (#3699) ...

* Added matrix tests for prepend() and identity()

* Added contains if branch tests for Circle and Ellipse

* Removed trailing whitespace in circle.js

* Added TilingSprite tests for contains, width and height

* Removed .only tag in TilingSprite test

* Changed test values for prepand and identity tests, as per change request

Removes pending tests from Container (#3769)

[v4.4] Revert "Fix #3609 , about `filterClamp` & `filterArea` (#3626)" (#3760) ...

* Revert "Fix #3609 , about `filterClamp` & `filterArea`  (#3626)"

The real fix is to exclude "filterClamp" from uniformData
That fixes outlineFilter and glowFilter

* added a test, so finscn wont break it again ;)

[v4.4] fix SpriteRenderer for multiple webgl renderers, fix tests, add "withGL" (#3758) ...

* fix SpriteRenderer for multiple webgl renderers, fix tests, add "withGL"

* isWebGLSupported renamed to withGL

centralise isWebGLSupported (#3740)

addChild/removeChild transform IDs were wrong (#3722) ...

* addChild/removeChild transform IDs were wrong

* better test

* uncomment expects

* also add removeChildren

* lint on tests

Fast rect blendMode problem (#3707) ...

* fast rect blendMode. Tested.

* add webgl-only test
add test for rgb2hex
fix problem in rgb2hex

Fixes #3701 (#3702)

Refactors the spritesheet, texture and bitmap font loaders (#3676) ...

* Refactors the spritesheet, texture and bitmap font loaders

* Fixes trailing space

* Addresses feedback in var caching and docs

* Adds unit test for Texture.fromLoader

* Adds new Spritesheet class

* Cleanup spritesheet destroy and imports

* Added baseTexture destroy to Spritesheet

Fixes test check for isWebGL (#3679)

Merge pull request #3666 from staff0rd/container_recalc_transform_tests ...

Added container recalc transform tests

Mask/Fill interaction tests + fix (#3615) ...

* added expectations

* specify hitArea

* change expectation

* added filterArea expectation

* heed hitArea when mask present

* typo

* removed filterArea from interaction

lint

trigger initial transform calc