lavu/version: bump minor version for DOVI sidedata

bump minor version for DOVI sidedata, because added the dovi_meta.h
as lavu API part. Also update APIchanges.
Signed-off-by: Jun Zhao <barryjzhao@tencent.com>

doc/APIchanges

@@ -15,8 +15,9 @@ libavutil:     2017-10-21
 
 API changes, most recent first:
 
-2020-04-22 - xxxxxxxxxx - lavc 58.81.100 - packet.h
-  Add AV_PKT_DATA_DOVI_CONF.
+2020-04-22 - 0e1db79e37 - lavc 58.81.100 - packet.h
+                        - lavu 56.43.100 - dovi_meta.h
+  Add AV_PKT_DATA_DOVI_CONF and AVDOVIDecoderConfigurationRecord.
 
 2020-04-15 - xxxxxxxxxx - lavc 58.79.100 - avcodec.h
   Add formal support for calling avcodec_flush_buffers() on encoders.

libavutil/version.h

@@ -79,8 +79,8 @@
  */
 
 #define LIBAVUTIL_VERSION_MAJOR  56
-#define LIBAVUTIL_VERSION_MINOR  42
-#define LIBAVUTIL_VERSION_MICRO 102
+#define LIBAVUTIL_VERSION_MINOR  43
+#define LIBAVUTIL_VERSION_MICRO 100
 
 #define LIBAVUTIL_VERSION_INT   AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \
                                                LIBAVUTIL_VERSION_MINOR, \