Log Message:
exempi: Update to 2.5.2

2.5.2 - 2020/06/24

- Bug #18: Remove an unnecessary message to stdout in the exempi tool.
  https://gitlab.freedesktop.org/libopenraw/exempi/-/issues/18
- Bug #20: Test file formats. This also change the GIF sample to GIF89a.
  https://gitlab.freedesktop.org/libopenraw/exempi/-/issues/20
- Bug #17: `make check` should build more reliably now.
  https://gitlab.freedesktop.org/libopenraw/exempi/issues/17
- MR !1: Remove deprecated C++ to compile with C++17.
  https://gitlab.freedesktop.org/libopenraw/exempi/merge_requests/1
- MR !2: Fix a build failure with C++17.
  https://gitlab.freedesktop.org/libopenraw/exempi/merge_requests/2

2.5.1 - 2019/07/28

- Bug #9: [CVE-2018-12648] Fix null-pointer-dereference in WEBP.
  https://gitlab.freedesktop.org/libopenraw/exempi/issues/9
- Bug #12: Invalid WEBP cause a memory overflow.
  https://gitlab.freedesktop.org/libopenraw/exempi/issues/12
- Bug #13: Fix a buffer a overflow in ID3 support on invalid MP3.
  https://gitlab.freedesktop.org/libopenraw/exempi/issues/13
- Bug #14: Invalid MP3 cause a memory overflow.
  https://gitlab.freedesktop.org/libopenraw/exempi/issues/14