upgrade to 0.1.21 and update changelog

Author: stevehu

CHANGELOG.md

@@ -9,6 +9,14 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ### Changed
 
+## 0.1.21 - 2018-08-14
+
+### Added
+
+### Changed
+- fixes #94 Fix min/max error message of integer fields displayed as doubles. Thanks @NicholasAzar
+- fixes #93 Adding support for nullable fields. Thanks @NicholasAzar
+
 ## 0.1.20 - 2018-07-30
 
 ### Added

pom.xml

@@ -19,7 +19,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.networknt</groupId>
     <artifactId>json-schema-validator</artifactId>
-    <version>0.1.20</version>
+    <version>0.1.21</version>
     <packaging>bundle</packaging>
     <description>A json schema validator that supports draft v4</description>
     <url>https://github.com/networknt/json-schema-validator</url>