Release 1.4.3 - 16.04.2021

NEW FEATURES
- SDK API TimeMat: the TimeMat (and thus TimeSurface) have gained
  a new method getOCVMatScaled(), this returns an OpenCV Mat suitable
  for displaying in a dv::Frame output (issue #340).
- Automated Tests: added more tests for AEDAT2 file conversion.
- File Input: support opening AEDAT4 files with no DataTable present.
  DataTable will be built on-the-fly, we recommend then re-recording
  the file to ensure it has a DataTable present (issue #397).

BUG FIXES
- converter: fixed AEDAT2 conversion failing due to stol() exception
  when long is 32bit instead of 64bit for time conversions (issue #398).
- Device Discovery: fix serial number being incorrectly determined on
  Windows for already open devices (issue libcaer#123).