upgrade to 1.0.57 and update changelog

Author: stevehu

CHANGELOG.md

@@ -10,6 +10,17 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ### Changed
 
+## 1.0.57 - 2021-07-09
+
+### Added
+
+### Changed
+
+- fixes #423 make sure additionalPropertiesSchema is not null in AdditionalPropertiesValidator. Thanks @flozano
+- fixes #421 Wrong validation of MultipleOfValidator. Thanks @ubergrohman
+- fixes #418 201909 false flag keywords additonalItems and then. Thanks @pgalbraith
+
+
 ## 1.0.56 - 2021-07-02
 
 ### Added

README.md

@@ -82,15 +82,15 @@ Maven:
 <dependency>
     <groupId>com.networknt</groupId>
     <artifactId>json-schema-validator</artifactId>
-    <version>1.0.56</version>
+    <version>1.0.57</version>
 </dependency>
 ```
 
 Gradle:
 
 ```
 dependencies {
-    compile(group: "com.networknt", name: "json-schema-validator", version: "1.0.56");
+    compile(group: "com.networknt", name: "json-schema-validator", version: "1.0.57");
 }
 ```
 

pom.xml

@@ -20,7 +20,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.networknt</groupId>
     <artifactId>json-schema-validator</artifactId>
-    <version>1.0.56</version>
+    <version>1.0.57</version>
     <packaging>bundle</packaging>
     <description>A json schema validator that supports draft v4, v6, v7 and v2019-09</description>
     <url>https://github.com/networknt/json-schema-validator</url>