output-geoservices fix: handle invalid url

[rgwozdz]

Recent refactor did not properly handle the Invalid URL response required on /MapServer route.

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🦋 Changeset detected

Latest commit: 3fb877b998cfcbf5736e2a8edf21c9d04607cb10

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 2 packages

| Name | Type | | -------------------------- | ----- | | @koopjs/output-geoservices | Patch | | @koopjs/koop-core | Patch |

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Coverage Report (change vs master)

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