set version to 5.2.0

Author: Zhihang Yao

CHANGES.md

@@ -1,7 +1,7 @@
 Change Log
 ==========
 
-### 5.2.1 - 2022-05-23
+### 5.2.0 - 2022-05-23
 
 ##### Additions
 * Added an option to replace all identifiers of features and geometries with UUIDs when exporting to CityGML/CityJSON. [#249](https://github.com/3dcitydb/importer-exporter/pull/249)

README.md

@@ -47,9 +47,9 @@ previous release of the 3D City Database Importer/Exporter under Apache License
 
 Latest release
 --------------
-The latest stable release of the 3D City Database Importer/Exporter is 5.2.1.
+The latest stable release of the 3D City Database Importer/Exporter is 5.2.0.
 
-Download the software [here](https://github.com/3dcitydb/importer-exporter/releases/download/v5.2.1/3DCityDB-Importer-Exporter-5.2.1.zip).
+Download the software [here](https://github.com/3dcitydb/importer-exporter/releases/download/v5.2.0/3DCityDB-Importer-Exporter-5.2.0.zip).
 Previous releases are available from the [releases section](https://github.com/3dcitydb/importer-exporter/releases).
 
 System requirements

build.gradle

@@ -6,7 +6,7 @@ plugins {
 
 apply from: 'properties.gradle'
 
-version '5.2.1'
+version '5.2.0'
 
 subprojects {
     apply plugin: 'java-library'