fix(createInstantsearch): fix missing props

Based on @zackify findings: add back the missing props types and forward
them to InstantSearch. This commit adds them explicitly.

packages/react-instantsearch/src/core/createInstantSearch.js

@@ -20,6 +20,10 @@ export default function createInstantSearch(defaultAlgoliaClient, root) {
         React.PropTypes.node,
       ]),
       indexName: PropTypes.string.isRequired,
+      searchParameters: PropTypes.object,
+      createURL: PropTypes.func,
+      searchState: PropTypes.object,
+      onSearchStateChange: PropTypes.func,
     };
 
     constructor(props) {
@@ -41,7 +45,11 @@ export default function createInstantSearch(defaultAlgoliaClient, root) {
     render() {
       return (
         <InstantSearch
+          createURL={this.props.createURL}
           indexName={this.props.indexName}
+          searchParameters={this.props.searchParameters}
+          searchState={this.props.searchState}
+          onSearchStateChange={this.props.onSearchStateChange}
           root={root}
           algoliaClient={this.client}
           children={this.props.children}