docs(select): Some little changes

src/services/select/README.md

@@ -116,11 +116,10 @@ service.append(organization, (err, data) => {
   if (err) {
     // Runtime stream not block.
     // Handle the error as you need as well.
-    // Do something if catch error
     throw new Error(err)
   }
 
-  doIfSuccess()
+  doStuff()
 })
 ```
 
@@ -154,7 +153,7 @@ service.getItemById('10', (item) => {
 
 ### `getItems`
 
-The `getItems` returns array with all appended earlier items or empty..
+The `getItems` returns an array object with all appended earlier items or empty.
 
 **Syntax**
 ```js