feat(engines/pil.read_multiple): Use Pillow to save multipage images as GIF

[scorphus]

The functionality provided by the images2gif module is part of Pillow since 2015. It also renders gifsicle unnecessary in this context.

[scorphus]

With this change, we're free to remove the version constraints for Pillow:

thumbor/setup.py

Lines 153 to 154 in 812ed4c

	# TODO: Pillow version 10.1.0 is raising a PIL.Image.DecompressionBombError on tests
	"Pillow==10.*,<10.1.0",

[coveralls]

Pull Request Test Coverage Report for Build 7762176489

• 0 of 4 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+2.3%) to 88.927%

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Totals
Change from base Build 7748021860:	2.3%
Covered Lines:	3879
Relevant Lines:	4362

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💛 - Coveralls

[scorphus]

Please, check #1644 before commenting on lint failure.

[scorphus]

Thanks for your review, @guilhermef.

While doing some benchmarks of those changes and seeing a small but welcomed performance improvement of around 5%, I encountered cases where the gifsicle sub process hangs indefinitely.

I already have a draft solution to that which I'll probably propose in a separate PR – as they're apparently unrelated issues.

However, merging this as it is forbids us from drafting a new release. So, let's wait until we have both changes ready.

#trickyone

[scorphus]

There we go, @guilhermef. I believe we're much better off having no gifsicle in pil.read_multiple. I'd appreciate another round of review.

[sonarcloud]

Quality Gate passed

Kudos, no new issues were introduced!

0 New issues
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud