add code highlight

README.md

@@ -12,8 +12,7 @@ To simply interact with Kevacoin API, use PHP library, e.g.
 
 `composer require kevachat/kevacoin`
 
-```
-
+``` php
 // Connect kevacoin
 $client = new \Kevachat\Kevacoin\Client(
     $protocol,
@@ -37,8 +36,8 @@ if ($meta = $client->kevaGet($namespace, '_CLITOR_IS_'))
         // Grab namespace records from blockchain
         if ($pieces = $client->kevaFilter($namespace))
         {
-          // Implement your app logic
-          echo $reader->data($pieces);
+            // Implement your app logic
+            echo $reader->data($pieces);
         }
     }
 }