Fix(utils): Chrome < 44 not support scrollingElement

Update README.md

Adds Typescript definitions package in Features

Bump mixin-deep from 1.3.1 to 1.3.2

Bumps [mixin-deep](https://github.com/jonschlinkert/mixin-deep) from 1.3.1 to 1.3.2.
- [Release notes](https://github.com/jonschlinkert/mixin-deep/releases)
- [Commits](https://github.com/jonschlinkert/mixin-deep/compare/1.3.1...1.3.2)
Signed-off-by: Ndependabot[bot] <support@github.com>

Added type check for 'dragStarted' variable as this is causing thousa…

Added type check for 'dragStarted' variable as this is causing thousands of console errors in Chrome, Firefox, Edge, IE, Safari before the first drag.
This change is harmless because it is just checking if the variable dragStarted is declared before using it.

Tested across all of the above browsers and working fine after this change.

add MSCSSMatrix to matrixFn options

disable delayed drag events during destory