feat(getState): add ability to find state

Currently, this lib expects the state to be at the key `toastr` (and even handles when the state object is an immutable object (via `state.get`). There is no way to define a custom / different location easily.

This adds an optional prop to the `ReduxToastr` component which is a function that takes the current state to provide the toastr state.

README.md

@@ -66,6 +66,7 @@ import ReduxToastr from 'react-redux-toastr'
       newestOnTop={false}
       preventDuplicates
       position="top-left"
+      getState={(state) => state.toastr} // This is the default
       transitionIn="fadeIn"
       transitionOut="fadeOut"
       progressBar

package.json

@@ -1,6 +1,6 @@
 {
   "name": "react-redux-toastr",
-  "version": "7.5.2",
+  "version": "7.6.0",
   "description": "react-redux-toastr is a React toastr message implemented with Redux",
   "main": "lib/index.js",
   "jsnext:main": "./src/index.js",

src/ReduxToastr.js

@@ -34,6 +34,7 @@ export class ReduxToastr extends React.Component {
     transitionOut: TRANSITIONS.out[0],
     preventDuplicates: false,
     closeOnToastrClick: false,
+    getState: (state) => state.toastr,
     confirmOptions: {
       okText: 'ok',
       cancelText: 'cancel'
@@ -155,8 +156,8 @@ export class ReduxToastr extends React.Component {
 }
 
 export default connect(
-  state => ({
-    toastr: state.toastr ? state.toastr : state.get('toastr')
+  (state, ownProps) => ({
+    toastr: ownProps.getState(state),
   }),
   actions
 )(ReduxToastr);