should not transform imageSourceSet to image-source-set

[JoviDeCroock]

fixes #3994

This ensures that imageSrcSet becomes a valid attribute imagesrcset as an added bonus this PR also adds support for imagesizes.

[coveralls]

Coverage: 99.706%. Remained the same when pulling 03aaec8 on image-source-set into fed3064 on master.

[github-actions]

Size Change: +9 B (0%)

Total Size: 56.6 kB

Filename	Size	Change
compat/dist/compat.js	4.07 kB	+3 B (0%)
compat/dist/compat.module.js	4 kB	+3 B (0%)
compat/dist/compat.umd.js	4.13 kB	+3 B (0%)

ℹ️ View Unchanged

Filename	Size	Change
debug/dist/debug.js	3.53 kB	0 B
debug/dist/debug.module.js	3.52 kB	0 B
debug/dist/debug.umd.js	3.6 kB	0 B
devtools/dist/devtools.js	232 B	0 B
devtools/dist/devtools.module.js	240 B	0 B
devtools/dist/devtools.umd.js	315 B	0 B
dist/preact.js	4.25 kB	0 B
dist/preact.min.js	4.28 kB	0 B
dist/preact.min.module.js	4.28 kB	0 B
dist/preact.min.umd.js	4.31 kB	0 B
dist/preact.module.js	4.28 kB	0 B
dist/preact.umd.js	4.32 kB	0 B
hooks/dist/hooks.js	1.53 kB	0 B
hooks/dist/hooks.module.js	1.56 kB	0 B
hooks/dist/hooks.umd.js	1.61 kB	0 B
jsx-runtime/dist/jsxRuntime.js	360 B	0 B
jsx-runtime/dist/jsxRuntime.module.js	326 B	0 B
jsx-runtime/dist/jsxRuntime.umd.js	441 B	0 B
test-utils/dist/testUtils.js	442 B	0 B
test-utils/dist/testUtils.module.js	444 B	0 B
test-utils/dist/testUtils.umd.js	526 B	0 B

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