Bump version in README

Author: oliemansm

README.md

@@ -54,11 +54,11 @@ A few libraries exist to ease the boilerplate pain, including [GraphQL-Java's bu
 <dependency>
     <groupId>com.graphql-java-kickstart</groupId>
     <artifactId>graphql-java-tools</artifactId>
-    <version>5.5.1</version>
+    <version>5.5.2</version>
 </dependency>
 ```
 ```groovy
-compile 'com.graphql-java-kickstart:graphql-java-tools:5.5.1'
+compile 'com.graphql-java-kickstart:graphql-java-tools:5.5.2'
 ```
 
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