bump version number

Author: leeturner

README.md

@@ -17,15 +17,15 @@ For Maven users:
 <dependency>
     <groupId>org.wiremock.extensions</groupId>
     <artifactId>wiremock-jwt-extension</artifactId>
-    <version>0.2.0</version>
+    <version>0.3.0</version>
 </dependency>
 ```
 
 For Gradle users:
 
 ```groovy
 dependencies {
-    implementation 'org.wiremock.extensions:wiremock-jwt-extension:0.2.0'
+    implementation 'org.wiremock.extensions:wiremock-jwt-extension:0.3.0'
 }
 ```