[misc] change appveyor to last recent MariaDB released version

(cherry picked from commit 32fdd7f)

Author: rusher

appveyor.yml

@@ -1,17 +1,17 @@
 version: '{build}'
 environment:
  matrix:
- - DB: '10.2.14'
+ - DB: '10.2.16'
  APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
  CMAKE_PARAM: 'Visual Studio 15 2017 Win64'
  JAVA_HOME: C:\Program Files\Java\jdk1.8.0
 
- - DB: '10.3.6'
+ - DB: '10.3.8'
  APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
  CMAKE_PARAM: 'Visual Studio 15 2017 Win64'
  JAVA_HOME: C:\Program Files\Java\jdk1.8.0
 
- - DB: '10.1.32'
+ - DB: '10.1.34'
  APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
  CMAKE_PARAM: 'Visual Studio 15 2017 Win64'
  JAVA_HOME: C:\Program Files\Java\jdk1.8.0