avcodec: bump minor and update Changelog for recent DST addition

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Changelog

@@ -34,6 +34,7 @@ version <next>:
 - DTS Express (LBR) decoder
 - Generic OpenMAX IL encoder with support for Raspberry Pi
 - IFF ANIM demuxer & decoder
+- Direct Stream Transfer (DST) decoder
 
 version 3.0:
 - Common Encryption (CENC) MP4 encoding and decoding support

libavcodec/version.h

@@ -28,8 +28,8 @@
 #include "libavutil/version.h"
 
 #define LIBAVCODEC_VERSION_MAJOR  57
-#define LIBAVCODEC_VERSION_MINOR  41
-#define LIBAVCODEC_VERSION_MICRO 102
+#define LIBAVCODEC_VERSION_MINOR  42
+#define LIBAVCODEC_VERSION_MICRO 100
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
                                                LIBAVCODEC_VERSION_MINOR, \