Update dependency isomorphic-fetch to v3

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This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
isomorphic-fetch (source)	^2.2.1 -> ^3.0.0

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[!WARNING] Some dependencies could not be looked up. Check the Dependency Dashboard for more information.

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Release Notes

matthew-andrews/isomorphic-fetch (isomorphic-fetch)

### [`v3.0.0`](https://togithub.com/matthew-andrews/isomorphic-fetch/compare/v2.2.1...v3.0.0) [Compare Source](https://togithub.com/matthew-andrews/isomorphic-fetch/compare/v2.2.1...v3.0.0)

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Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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• [ ] If you want to rebase/retry this PR, check this box

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⚠ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

♻ Renovate will retry this branch, including artifacts, only when one of the following happens:

• any of the package files in this branch needs updating, or
• the branch becomes conflicted, or
• you click the rebase/retry checkbox if found above, or
• you rename this PR's title to start with "rebase!" to trigger it manually

The artifact failure details are included below:

File name: yarn.lock

/opt/containerbase/tools/node/4.4.7/bin/node: bad option: --use-openssl-ca