* [transform-react-jsx] Add useSpread option to transform JSX
* Add validation for default option
* Add error when using useSpread and useBuiltIns at the same time
* Move useSpread to convertAttribute helper function
* Add useSpread option to presect-react
* Remove casting useSpread to boolean in preset-react option.
Co-Authored-By: Nicolò Ribaudo <nicolo.ribaudo@gmail.com>
Given the following
```js
a = <F new/>
```
We used to generate:
```js
a = React.createElement(F, {"new": true})
```
but now we generate
```js
a = React.createElement(F, {new: true})
```
If you need to quote these (ie for ES3 you can use
transform-property-literals)
* Revert "Move subclass inheritance to end (#7772)"
This reverts commit f8ab9466d331871a90f458af40b14e8d831e0c29.
* Only use getPrototypeOf if setPrototypeOf is implemented
* Update fixtures
* Helpers updates
* Update fixtures
* Fall back to getPrototypeOf
* Update fixtures
We were using `Object.create` to setup the prototype chain at the start of the class definition, which lead to #7771.
I was a bit worried about a speed hit, but it seems everyone optimizes the two patterns the same way.
https://jsbench.github.io/#f9fca52407643d96458a35763b201215Fixes#7771.
* #7349
- Add "use strict" directive to transformed class bodies
* Update tests (#7349)
* Add test for program with use strict directive (#7349)
* Update tests (#7349)
* Update source mapping (#7349)
* Add test for parent blockStatement with use strict directive (#7349)
* Update tests (#7349)
* Update tests (#7349)
* Update tests (#7349)
* Add test for constructor-only class (#7349)
* Constructor only classes are strict, too
But constructor only that use non-simple parameters must use a strict function wrapper.
* Fix test
* Wrapper not needed if class is already strict
* Revert change to lerna.json
