Add version 1.21 jar file and description.

Author: javadev

README.md

@@ -34,7 +34,7 @@ Include the following in your `pom.xml` for Maven:
   <dependency>
     <groupId>com.github.javadev</groupId>
     <artifactId>underscore</artifactId>
-    <version>1.20</version>
+    <version>1.21</version>
   </dependency>
   ...
 </dependencies>
@@ -43,7 +43,7 @@ Include the following in your `pom.xml` for Maven:
 Gradle:
 
 ```groovy
-compile 'com.github.javadev:underscore:1.20'
+compile 'com.github.javadev:underscore:1.21'
 ```
 
 Underscore-java is a java port of [Underscore.js](http://underscorejs.org/).

lodash-plugin/README.md

@@ -19,7 +19,7 @@ Include the following in your `pom.xml` for Maven:
   <dependency>
     <groupId>com.github.javadev</groupId>
     <artifactId>underscore-lodash</artifactId>
-    <version>1.16</version>
+    <version>1.17</version>
   </dependency>
   ...
 </dependencies>
@@ -28,7 +28,7 @@ Include the following in your `pom.xml` for Maven:
 Gradle:
 
 ```groovy
-compile 'com.github.javadev:underscore-lodash:1.16'
+compile 'com.github.javadev:underscore-lodash:1.17'
 ```
 
 Underscore-lodash is a java port of [lodash.com](https://lodash.com/docs).