chore(release): 3.0.0 [skip ci]

# [3.0.0](v2.9.0...v3.0.0) (2019-04-15)

### Features

* use stable context API ([#471](#471)) ([aee4901](aee4901)), closes [#429](#429)

### BREAKING CHANGES

* use new style react context

```diff
// package.json
-"react": "^15.0.0",
+"react": "^16.6.0",
-"react-dom": "^15.0.0",
+"react-dom": "^16.6.0",
```

CHANGELOG.md

@@ -1,3 +1,23 @@
+# [3.0.0](https://github.com/reactjs/react-transition-group/compare/v2.9.0...v3.0.0) (2019-04-15)
+
+
+### Features
+
+* use stable context API ([#471](https://github.com/reactjs/react-transition-group/issues/471)) ([aee4901](https://github.com/reactjs/react-transition-group/commit/aee4901)), closes [#429](https://github.com/reactjs/react-transition-group/issues/429)
+
+
+### BREAKING CHANGES
+
+* use new style react context
+
+```diff
+// package.json
+-"react": "^15.0.0",
++"react": "^16.6.0",
+-"react-dom": "^15.0.0", 
++"react-dom": "^16.6.0", 
+```
+
 # [2.9.0](https://github.com/reactjs/react-transition-group/compare/v2.8.0...v2.9.0) (2019-04-06)
 
 

package.json

@@ -1,6 +1,6 @@
 {
   "name": "react-transition-group",
-  "version": "2.9.0",
+  "version": "3.0.0",
   "description": "A react component toolset for managing animations",
   "main": "lib/index.js",
   "scripts": {