Add jpeg/avif as supported conversion formats #18

Job	Run time
Unit_tests (18, ubuntu-latest)	22s
Unit_tests (18, macOS-latest)	14s
Unit_tests (18, windows-latest)	39s
Unit_tests (20, ubuntu-latest)	15s
Unit_tests (20, macOS-latest)	12s
Unit_tests (20, windows-latest)	39s
Unit_tests (22, ubuntu-latest)	19s
Unit_tests (22, macOS-latest)	16s
Unit_tests (22, windows-latest)	30s
Unit_tests (23, ubuntu-latest)	16s
Unit_tests (23, macOS-latest)	15s
Unit_tests (23, windows-latest)	39s
Integration_tests (18, ubuntu-latest)	14s
Integration_tests (18, macOS-latest)	18s
Integration_tests (18, windows-latest)	40s
Integration_tests (20, ubuntu-latest)	14s
Integration_tests (20, macOS-latest)	16s
Integration_tests (20, windows-latest)	46s
Integration_tests (22, ubuntu-latest)	13s
Integration_tests (22, macOS-latest)	13s
Integration_tests (22, windows-latest)	42s
Integration_tests (23, ubuntu-latest)	17s
Integration_tests (23, macOS-latest)	21s
Integration_tests (23, windows-latest)	28s
Publish	0s
	9m 18s

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