Merge tag '3.4.2'

diff --cc modules/core/include/opencv2/core/version.hpp
index 28cf598,28a25ee..2afbb55
--- 1/modules/core/include/opencv2/core/version.hpp
--- 2/modules/core/include/opencv2/core/version.hpp
+++ b/modules/core/include/opencv2/core/version.hpp
@@@ -7,8 -7,8 +7,8 @@@
  
  #define CV_VERSION_MAJOR    3
  #define CV_VERSION_MINOR    4
- #define CV_VERSION_REVISION 1
+ #define CV_VERSION_REVISION 2
 -#define CV_VERSION_STATUS   ""
 +#define CV_VERSION_STATUS   "-dev"
  
  #define CVAUX_STR_EXP(__A)  #__A
  #define CVAUX_STR(__A)      CVAUX_STR_EXP(__A)