Zero Mutation Text Hydration

[developit]

I wrote a design doc instead of super long code comments:
https://github.com/preactjs/preact/wiki/Hydration-Design-Documentation

[github-actions]

Size Change: +40 B (0%)

Total Size: 38.4 kB

Filename	Size	Change
dist/preact.js	3.71 kB	+11 B (0%)
dist/preact.min.js	3.71 kB	+11 B (0%)
dist/preact.module.js	3.73 kB	+10 B (0%)
dist/preact.umd.js	3.77 kB	+8 B (0%)

ℹ️ View Unchanged

Filename	Size	Change
compat/dist/compat.js	3 kB	0 B
compat/dist/compat.module.js	3.03 kB	0 B
compat/dist/compat.umd.js	3.05 kB	0 B
debug/dist/debug.js	3.08 kB	0 B
debug/dist/debug.module.js	3.06 kB	0 B
debug/dist/debug.umd.js	3.14 kB	0 B
devtools/dist/devtools.js	175 B	0 B
devtools/dist/devtools.module.js	185 B	0 B
devtools/dist/devtools.umd.js	252 B	0 B
hooks/dist/hooks.js	1.06 kB	0 B
hooks/dist/hooks.module.js	1.08 kB	0 B
hooks/dist/hooks.umd.js	1.12 kB	0 B
test-utils/dist/testUtils.js	390 B	0 B
test-utils/dist/testUtils.module.js	392 B	0 B
test-utils/dist/testUtils.umd.js	469 B	0 B

_{compressed-size-action}

[coveralls]

Coverage remained the same at 100.0% when pulling f0aa50e on zero-mutation-text-hydration into a0c6009 on master.

[JoviDeCroock]

This is awesome!