Update README.md

Upgraded maven dependency version to 0.1.2, which seems to be the current one

jest/README.md

@@ -37,7 +37,7 @@ Add Jest as a dependency to your project.
 <dependency>
   <groupId>io.searchbox</groupId>
   <artifactId>jest</artifactId>
-  <version>0.1.1</version>
+  <version>0.1.2</version>
 </dependency>
 ```