upgrade to 0.1.20 and update changelog

Author: stevehu

CHANGELOG.md

@@ -9,6 +9,17 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ### Changed
 
+## 0.1.20 - 2018-07-30
+
+### Added
+
+### Changed
+- fixes #85 Update version in maven dependnecy sample. Thanks @banterCZ
+- fixes #89 Added example for custom keywords in tests. Thanks @Klas Kalaß
+- fixes #90 Remove unused dependency to slf4j-ext due to security issue. Thanks @Thorbias
+- fixes #91 update one test case to ensure compatibility of Java 6
+- fixes #92 rollback type validator for null value as it is against spec.
+
 ## 0.1.19 - 2018-04-07
 
 ### Added

pom.xml

@@ -19,7 +19,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.networknt</groupId>
     <artifactId>json-schema-validator</artifactId>
-    <version>0.1.19</version>
+    <version>0.1.20</version>
     <packaging>bundle</packaging>
     <description>A json schema validator that supports draft v4</description>
     <url>https://github.com/networknt/json-schema-validator</url>