In tests, skip Babel on node_modules when not down leveling

[andrewiggins]

Local tests run a lot faster now since we aren't running babel on all of React DOM

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Latest commit: e2d61ba

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[github-actions]

Size Change: 0 B

Total Size: 79.7 kB

ℹ️ View Unchanged

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packages/react-transform/dist/signals-transform.umd.js	3.64 kB
packages/react/dist/signals.js	1.35 kB
packages/react/dist/signals.mjs	1.29 kB

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