- Update to 7.1.2:
* This fixes a regression introduced in 7.1.0 when adding support
for APNG files.
* When calling seek(n) on a regular PNG where n > 0, it failed to
raise an EOFError as it should have done

- update to version 7.1.1:
* Fix regression seeking and telling PNGs #4512 #4514 [hugovk,
radarhere]
- changes from version 7.1.0:
* Fix multiple OOB reads in FLI decoding #4503 [wiredfool]
* Fix buffer overflow in SGI-RLE decoding #4504 [wiredfool, hugovk]
* Fix bounds overflow in JPEG 2000 decoding #4505 [wiredfool]
* Fix bounds overflow in PCX decoding #4506 [wiredfool]
* Fix 2 buffer overflows in TIFF decoding #4507 [wiredfool]
* Add APNG support #4243 [pmrowla, radarhere, hugovk]
* ImageGrab.grab() for Linux with XCB #4260 [nulano, radarhere]
* Added three new channel operations #4230 [dwastberg, radarhere]
* Prevent masking of Image reduce method in Jpeg2KImagePlugin #4474
[radarhere, homm]
* Added reading of earlier ImageMagick PNG EXIF data #4471
[radarhere]
* Fixed endian handling for I;16 getextrema #4457 [radarhere]
* Release buffer if function returns prematurely #4381 [radarhere]
* Add JPEG comment to info dictionary #4455 [radarhere]
* Fix size calculation of Image.thumbnail() #4404 [orlnub123]
* Fixed stroke on FreeType < 2.9 #4401 [radarhere]
* If present, only use alpha channel for bounding box #4454
[radarhere]
* Warn if an unknown feature is passed to features.check() #4438