Add missing period to pivot docs (#5073)

Improved documentation ...

Class member documentation improved via removal of unnecessary @memberofs - more members now show up in the docs.
Class getter/setter documentation improved using technique above, and also by removing documentation for setters. Documentation was only showing the setter docs, whereas the getter is where the important information is. JSDoc maintainers themselves recommend just doccing the getter jsdoc3/jsdoc#973
Documented a few classes to let devs know that they are automatically created by PIXI and added to renderer.plugins, like interactionManager and prepare

Change the code lines order in updateTransform in TransformStatic.js (#3404) ...

* Update TransformStatic.js

```
            const pt = parentTransform.worldTransform;
            const wt = this.worldTransform;
```
the code above in updateTransform  is not needed always.

And another reason is like  https://github.com/pixijs/pixi.js/pull/3391

* Update TransformStatic.js

remove the trailing-spaces.

use private field

fixed tests

Fix for order of skew and scale in transform, plus a test

clean up to be specific

Huge refactor to match a new shiny eslint file.

Prefer const (#3002) ...

* added prefer-const rule to .eslintrc

* eslint const autofixes

* manual let to const changes; lint free;

* added brace style 'allman' to eslintrc

* brace style, comment fixes and default arg

* brace style fixes

* more brace styles

* Point default args

* Point brace styles

* Observable Point default args

* more brace styles

* jsdoc comment style

* brace style

* brace styles and small jsdoc fix

* brace styles

* removed unneeded eslint inline comment

* brace styles; lint free

some more es6 changes (#2969) ...

* some more es6 changes
- const instead of let if possible
- arrow functions
- string templates
- argument defaults

* object property shorthand

* some more es6 changes
- const instead of let if possible
- arrow functions
- string templates
- argument defaults

* Revert "Merge branch 'dev-es6-sb' of github.com:stbaer/pixi.js into dev-es6-sb"

This reverts commit 8d3af81, reversing
changes made to e8b9948.

* Revert "Merge branch 'dev-es6' into dev-es6-sb"

This reverts commit 3eeaf79, reversing
changes made to fb69536.

* Revert "Revert "Merge branch 'dev-es6-sb' of github.com:stbaer/pixi.js into dev-es6-sb""

This reverts commit c860228.

* fix RenderTexture, incomplete merge

* fix for text font properties

* reverted some changes

* checked out License, Readme and Contributinf from dev-es6

* editorconfig updated: 2 spaces for .eslintrc

* added eslint rule: spaces around fat arrow

* used eslint fix for consistent spaces around fat arrow

* don't allow scale.x or scale.y to be 0 in displayObject setTransform

* removed jshint comments (again)

Update imports and exports, getters and setters

Disallow the use of `var`

Implementing classes using the new ES6 syntax (#2936) ...

* Migration to ES6 classes

* Migration to ES6 classes

* Migration to ES6 classes

* Migration to ES6 classes

* Using babelify to transpile ES6 code

* Adding babel-preset-es2015 in devDependencies

sprite bounds tweaks (#2817) ...

* sprite bounds tweaks

* added a trimmed sprite test

* tweaks to tint

wrong place i know..

dots and commas (#2818)

initialize _localID (#2789)

update fix for setting a matrix

simple transform refactoring (#2732) ...

* simple transform refactoring

* TransformManual deprecation

Multiple documentation fixes

Docs update (#2651) ...

* Epic run through the docs

* Fixed merge issue

* PIXI.utils now outputs its documentation correctly

removed updateChildTransform

added setFromMatrix

tweaked transform static ..

moved ObservablePoint to a better home

Added static transforms

Merge remote-tracking branch 'upstream/dev' into jsdoc-fixes ...

# Conflicts:
#	src/core/renderers/webgl/WebGLRenderer.js
#	src/core/sprites/webgl/SpriteRenderer.js
#	src/extract/canvas/CanvasExtract.js
#	src/extract/webgl/WebGLExtract.js

Updated and fixed JSDocs

changes in transformStatic - forget about parent for some time. Static is only local thing

expose Transform and TransformStatic, REQUIRED FOR PIXI-SPINE

more changes in transform