Fix filter usage documentation

closes #48

Author: fzaninotto

README.md

@@ -340,7 +340,7 @@ Here is how you can use the queries and mutations generated for your data, using
             <pre>
 // filter the result using any of the entity fields
 {
-  allPosts(views: 254) {
+  allPosts({ filter: { views: 254 }}) {
     title
     views
   }
@@ -365,7 +365,7 @@ Here is how you can use the queries and mutations generated for your data, using
 // number fields get range filters
 // -lt, _lte, -gt, and _gte
 {
-  allPosts(views_gte: 200) {
+  allPosts({ filter: { views_gte: 200 } }) {
     title
     views
   }