update README.md

Author: stevehu

README.md

@@ -42,7 +42,7 @@ Add the following to your `pom.xml`:
 <dependency>
     <groupId>com.networknt</groupId>
     <artifactId>json-schema-validator</artifactId>
-    <version>0.1.5</version>
+    <version>0.1.7</version>
 </dependency>
 ```