Update dependency @rollup/plugin-node-resolve to v8.4.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
@rollup/plugin-node-resolve (source)	8.1.0 → 8.4.0

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Release Notes

rollup/plugins (@​rollup/plugin-node-resolve)

v8.4.0

2020-07-12

Features

• feat: preserve search params and hashes (#​487)
• feat: support .js imports in TypeScript (#​480)

Updates

• docs: fix named export use in readme (#​456)
• docs: correct mainFields valid values (#​469)

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