Merge #20

20: Update react monorepo to v16.4.0 r=renovate[bot] a=renovate[bot]

This Pull Request renovates the package group "react monorepo".


-   [react-dom](https://github.com/facebook/react) (`dependencies`): from `16.3.2` to `16.4.0`
-   [react](https://github.com/facebook/react) (`dependencies`): from `16.3.2` to `16.4.0`

# Release Notes
<details>
<summary>facebook/react</summary>

### [`v16.4.0`](https://github.com/facebook/react/blob/master/CHANGELOG.md#&#8203;1640-May-23-2018)
[Compare Source](facebook/react@8e5f12c...v16.4.0)
##### React

* Add a new [experimental](`https://github.com/reactjs/rfcs/pull/51`) `React.unstable_Profiler` component for measuring performance. ([@&#8203;bvaughn] in [#&#8203;12745](`https://github.com/facebook/react/pull/12745`))
##### React DOM

* Add support for the Pointer Events specification. ([@&#8203;philipp-spiess] in [#&#8203;12507](`https://github.com/facebook/react/pull/12507`))
* Properly call `getDerivedStateFromProps()` regardless of the reason for re-rendering. ([@&#8203;acdlite] in [#&#8203;12600](`https://github.com/facebook/react/pull/12600`) and [#&#8203;12802](`https://github.com/facebook/react/pull/12802`))
* Fix a bug that prevented context propagation in some cases. ([@&#8203;gaearon] in [#&#8203;12708](`https://github.com/facebook/react/pull/12708`))
* Fix re-rendering of components using `forwardRef()` on a deeper `setState()`. ([@&#8203;gaearon] in [#&#8203;12690](`https://github.com/facebook/react/pull/12690`))
* Fix some attributes incorrectly getting removed from custom element nodes. ([@&#8203;airamrguez] in [#&#8203;12702](`https://github.com/facebook/react/pull/12702`))
* Fix context providers to not bail out on children if there's a legacy context provider above. ([@&#8203;gaearon] in [#&#8203;12586](`https://github.com/facebook/react/pull/12586`))
* Add the ability to specify `propTypes` on a context provider component. ([@&#8203;nicolevy] in [#&#8203;12658](`https://github.com/facebook/react/pull/12658`))
* Fix a false positive warning when using `react-lifecycles-compat` in `<StrictMode>`. ([@&#8203;bvaughn] in [#&#8203;12644](`https://github.com/facebook/react/pull/12644`))
* Warn when the `forwardRef()` render function has `propTypes` or `defaultProps`. ([@&#8203;bvaughn] in [#&#8203;12644](`https://github.com/facebook/react/pull/12644`))
* Improve how `forwardRef()` and context consumers are displayed in the component stack. ([@&#8203;sophiebits] in [#&#8203;12777](`https://github.com/facebook/react/pull/12777`))
* Change internal event names. This can break third-party packages that rely on React internals in unsupported ways. ([@&#8203;philipp-spiess] in [#&#8203;12629](`https://github.com/facebook/react/pull/12629`))
##### React Test Renderer

* Fix the `getDerivedStateFromProps()` support to match the new React DOM behavior. ([@&#8203;koba04] in [#&#8203;12676](`https://github.com/facebook/react/pull/12676`))
* Fix a `testInstance.parent` crash when the parent is a fragment or another special node. ([@&#8203;gaearon] in [#&#8203;12813](`https://github.com/facebook/react/pull/12813`))
* `forwardRef()` components are now discoverable by the test renderer traversal methods. ([@&#8203;gaearon] in [#&#8203;12725](`https://github.com/facebook/react/pull/12725`))
* Shallow renderer now ignores `setState()` updaters that return `null` or `undefined`. ([@&#8203;koba04] in [#&#8203;12756](`https://github.com/facebook/react/pull/12756`))
##### React ART

* Fix reading context provided from the tree managed by React DOM. ([@&#8203;acdlite] in [#&#8203;12779](`https://github.com/facebook/react/pull/12779`))
##### React Call Return (Experimental)

* This experiment was deleted because it was affecting the bundle size and the API wasn't good enough. It's likely to come back in the future in some other form. ([@&#8203;gaearon] in [#&#8203;12820](`https://github.com/facebook/react/pull/12820`))
##### React Reconciler (Experimental)

* The [new host config shape](https://github.com/facebook/react/blob/c601f7a64640290af85c9f0e33c78480656b46bc/packages/react-noop-renderer/src/createReactNoop.js#L82-L285) is flat and doesn't use nested objects. ([@&#8203;gaearon] in [#&#8203;12792](`https://github.com/facebook/react/pull/12792`))

---


</details>




---

This PR has been generated by [Renovate Bot](https://renovatebot.com).

Co-authored-by: Renovate Bot <bot@renovateapp.com>

package.json

@@ -4,8 +4,8 @@
   "private": true,
   "dependencies": {
     "classnames": "2.2.5",
-    "react": "16.3.2",
-    "react-dom": "16.3.2",
+    "react": "16.4.0",
+    "react-dom": "16.4.0",
     "react-scripts": "1.1.4"
   },
   "homepage": "https://mythmon.github.io/corsica-tree-status",

yarn.lock

@@ -5412,9 +5412,9 @@ react-dev-utils@^5.0.1:
     strip-ansi "3.0.1"
     text-table "0.2.0"
 
-react-dom@16.3.2:
-  version "16.3.2"
-  resolved "https://registry.yarnpkg.com/react-dom/-/react-dom-16.3.2.tgz#cb90f107e09536d683d84ed5d4888e9640e0e4df"
+react-dom@16.4.0:
+  version "16.4.0"
+  resolved "https://registry.yarnpkg.com/react-dom/-/react-dom-16.4.0.tgz#099f067dd5827ce36a29eaf9a6cdc7cbf6216b1e"
   dependencies:
     fbjs "^0.8.16"
     loose-envify "^1.1.0"
@@ -5470,9 +5470,9 @@ react-scripts@1.1.4:
   optionalDependencies:
     fsevents "^1.1.3"
 
-react@16.3.2:
-  version "16.3.2"
-  resolved "https://registry.yarnpkg.com/react/-/react-16.3.2.tgz#fdc8420398533a1e58872f59091b272ce2f91ea9"
+react@16.4.0:
+  version "16.4.0"
+  resolved "https://registry.yarnpkg.com/react/-/react-16.4.0.tgz#402c2db83335336fba1962c08b98c6272617d585"
   dependencies:
     fbjs "^0.8.16"
     loose-envify "^1.1.0"