Set version to 6.15.2

CHANGELOG.md

 ArduinoJson: change log
 =======================
 
-HEAD
-----
+v6.15.2 (2020-05-15)
+-------
 
 * CMake: don't build tests when imported in another project
 * CMake: made project arch-independent

README.md

@@ -2,7 +2,7 @@
 
 ---
 
-[![arduino-library-badge](https://www.ardu-badge.com/badge/ArduinoJson.svg?version=6.15.1)](https://www.ardu-badge.com/ArduinoJson/6.15.1)
+[![arduino-library-badge](https://www.ardu-badge.com/badge/ArduinoJson.svg?version=6.15.2)](https://www.ardu-badge.com/ArduinoJson/6.15.2)
 [![Build Status](https://ci.appveyor.com/api/projects/status/m7s53wav1l0abssg/branch/6.x?svg=true)](https://ci.appveyor.com/project/bblanchon/arduinojson/branch/6.x)
 [![Build Status](https://travis-ci.org/bblanchon/ArduinoJson.svg?branch=6.x)](https://travis-ci.org/bblanchon/ArduinoJson)
 [![Fuzzing Status](https://oss-fuzz-build-logs.storage.googleapis.com/badges/arduinojson.svg)](https://bugs.chromium.org/p/oss-fuzz/issues/list?sort=-opened&can=1&q=proj:arduinojson)

appveyor.yml

-version: 6.15.1.{build}
+version: 6.15.2.{build}
 environment:
   matrix:
   - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019

library.json

@@ -7,7 +7,7 @@
     "type": "git",
     "url": "https://github.com/bblanchon/ArduinoJson.git"
   },
-  "version": "6.15.1",
+  "version": "6.15.2",
   "authors": {
     "name": "Benoit Blanchon",
     "url": "https://blog.benoitblanchon.fr"

library.properties

 name=ArduinoJson
-version=6.15.1
+version=6.15.2
 author=Benoit Blanchon <blog.benoitblanchon.fr>
 maintainer=Benoit Blanchon <blog.benoitblanchon.fr>
 sentence=A simple and efficient JSON library for embedded C++.

src/ArduinoJson/version.hpp

@@ -4,7 +4,7 @@
 
 #pragma once
 
-#define ARDUINOJSON_VERSION "6.15.1"
+#define ARDUINOJSON_VERSION "6.15.2"
 #define ARDUINOJSON_VERSION_MAJOR 6
 #define ARDUINOJSON_VERSION_MINOR 15
-#define ARDUINOJSON_VERSION_REVISION 1
+#define ARDUINOJSON_VERSION_REVISION 2