Tweak package exports

[developit]

Fix usage in Jest, drop *.module.js for just .mjs (files were nearly identical), don't include "browser" export map key, do include "module" export map key (to avoid dual package hazard).

[changeset-bot]

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Latest commit: 870f45e

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[github-actions]

Size Change: -4.42 kB (-5.32%) ✅

Total Size: 78.6 kB

Filename	Size	Change
docs/dist/assets/bench.********.js	1.59 kB	-2 B (-0.13%)
docs/dist/assets/client.********.js	46.3 kB	-5 B (-0.01%)
docs/dist/assets/index.********.js	1.07 kB	+237 B (+28.28%)	🚨
docs/dist/assets/signals-core.module.********.js	0 B	-1.4 kB (removed)	🏆
docs/dist/assets/signals.module.********.js	0 B	-2.02 kB (removed)	🏆
docs/dist/basic-********.js	241 B	-3 B (-1.23%)
docs/dist/demos-********.js	3.44 kB	-8 B (-0.23%)
docs/dist/react-********.js	235 B	-7 B (-2.89%)
packages/core/dist/signals-core.mjs	1.47 kB	-7 B (-0.47%)
packages/preact/dist/signals.mjs	1.22 kB	-3 B (-0.25%)
packages/react-transform/dist/signals-transform.mjs	4.95 kB	+679 B (+15.91%)	⚠️
packages/react-transform/dist/signals-transform.umd.js	0 B	-5.15 kB (removed)	🏆
packages/react/dist/signals.mjs	0 B	-150 B (removed)	🏆
docs/dist/assets/signals-core.********.js	1.4 kB	+1.4 kB (new file)	🆕
docs/dist/assets/signals.********.js	2.02 kB	+2.02 kB (new file)	🆕

ℹ️ View Unchanged

Filename	Size
docs/dist/assets/jsxRuntime.module.********.js	284 B
docs/dist/assets/preact.module.********.js	4.03 kB
docs/dist/assets/style.********.js	21 B
docs/dist/assets/style.********.css	1.24 kB
docs/dist/nesting-********.js	1.13 kB
packages/core/dist/signals-core.js	1.45 kB
packages/preact/dist/signals.js	1.27 kB
packages/react-transform/dist/signals-*********.js	5.03 kB
packages/react/dist/signals.js	188 B

_{compressed-size-action}

[rschristian]

New major or sneak it into a minor?

[mvalenko-f9]

Hi! When is it gonna be merged? Very important fix :)