move to umd and make browser a modular export

[JoviDeCroock]

This was proposed in: #2282 (comment)

Would like some eyes on this

[github-actions]

Size Change: 0 B

Total Size: 38.4 kB

ℹ️ View Unchanged

Filename	Size	Change
compat/dist/compat.js	3 kB	0 B
compat/dist/compat.module.js	3.02 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	3.07 kB	0 B
debug/dist/debug.umd.js	3.15 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
dist/preact.js	3.7 kB	0 B
dist/preact.min.js	3.7 kB	0 B
dist/preact.module.js	3.72 kB	0 B
dist/preact.umd.js	3.77 kB	0 B
hooks/dist/hooks.js	1.05 kB	0 B
hooks/dist/hooks.module.js	1.08 kB	0 B
hooks/dist/hooks.umd.js	1.13 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 99.792% when pulling a25209c on implement-umd-proposition into 6bbc17b on master.

[marvinhagemeister]

Sweet👍